Light
•Download as PPTX, PDF•
0 likes•281 views
In this ppt you can learn about the light first by recall second by the different type of questions which help you in board as well as competitive exam
Report
Share
Report
Share
Recommended
Power Point Presentation
This document discusses spherical mirrors and their properties. There are two main types of spherical mirrors: convex mirrors, whose reflective surface curves outward, and concave mirrors, whose reflective surface curves inward. Concave mirrors form real images where the object and image are on the same side of the mirror, while convex mirrors form virtual images where the object and image are on opposite sides of the mirror.
3. 15. light
1) Light travels in a straight line. An experiment using a pipe or tube shows that light from a candle cannot be seen if the pipe is bent, demonstrating that light travels in a straight path.
2) When light hits a mirror, it changes direction, which is called reflection. An experiment using a mirror and torch shows that moving the torch or mirror changes the direction of the reflected light.
3) A plane mirror forms an image that is erect, the same size as the object, and the same distance from the mirror as the object. The image is also virtual and left and right are reversed in the image.
Curved Mirrors (Concave and Convex)
This document discusses curved mirrors, including concave and convex mirrors. It defines key terms like center of curvature, focal point, vertex, radius of curvature, and focal length. The document explains that concave mirrors form real, inverted images between the focal point and center of curvature, and virtual, upright images beyond the focal point. Convex mirrors always form virtual, upright images that are smaller than the object. Diagrams demonstrate the ray tracing method for different object positions with concave and convex mirrors.
Spherical Mirrors
The document discusses different optical devices including lenses, mirrors, and prisms. It focuses on spherical mirrors, describing the two types - concave and convex mirrors. Key details are provided on the center of curvature, radius of curvature, principal axis, pole, focus, and focal length. The mirror formula relating object distance, image distance, and focal length is defined. Characteristics of images formed by concave and convex mirrors in different situations are explained. Uses of concave and convex mirrors are also noted.
Reflection and refraction
1) Light behaves both as a wave and particle. It undergoes various phenomena like reflection, refraction, diffraction etc. which were explained by wave theory.
2) Reflection of light follows the laws - the angle of incidence equals the angle of reflection, and the incident ray, normal and reflected ray lie in the same plane. Reflection can be regular from smooth surfaces or diffuse from rough surfaces.
3) Spherical mirrors are either concave or convex. Concave mirrors converge parallel rays to a focal point, while convex mirrors diverge them from a focal point behind the mirror. Images formed depend on the position of the object.
Geometrical Optics QA 1
JEE Physics/ Lakshmikanta Satapathy/ Ray Optics part 1/ Question on Image formation by a plane mirror of finite thickness solved using the concept of real depth and apparent depth
Converging Mirror And Diverging Mirror
The document summarizes the properties of converging and diverging mirrors. It discusses the characteristics of converging mirrors such as having a concave reflecting surface and forming real, inverted images. Rules for ray diagrams and image formation based on the object's position relative to the mirror's focal point and center of curvature are provided. Properties of images formed by diverging mirrors, which have a convex reflecting surface, are also covered. Formulas for calculating mirror equations and image characteristics are presented. Practice problems demonstrate applying the concepts and formulas to example scenarios.
Refraction of light at a plane surface
This document contains important theory questions about refraction of light at a plane surface and total internal reflection. It includes 24 multiple choice and derivation questions covering topics such as Snell's law, refractive index, critical angle, total internal reflection, mirages, reflecting prisms, reversing prisms, erecting prisms, optical fibers, and their applications. The document was prepared by Mukesh N Tekwani and provides a comprehensive review of key concepts and formulas relating to the refraction and total internal reflection of light.
Recommended
Power Point Presentation
This document discusses spherical mirrors and their properties. There are two main types of spherical mirrors: convex mirrors, whose reflective surface curves outward, and concave mirrors, whose reflective surface curves inward. Concave mirrors form real images where the object and image are on the same side of the mirror, while convex mirrors form virtual images where the object and image are on opposite sides of the mirror.
3. 15. light
1) Light travels in a straight line. An experiment using a pipe or tube shows that light from a candle cannot be seen if the pipe is bent, demonstrating that light travels in a straight path.
2) When light hits a mirror, it changes direction, which is called reflection. An experiment using a mirror and torch shows that moving the torch or mirror changes the direction of the reflected light.
3) A plane mirror forms an image that is erect, the same size as the object, and the same distance from the mirror as the object. The image is also virtual and left and right are reversed in the image.
Curved Mirrors (Concave and Convex)
This document discusses curved mirrors, including concave and convex mirrors. It defines key terms like center of curvature, focal point, vertex, radius of curvature, and focal length. The document explains that concave mirrors form real, inverted images between the focal point and center of curvature, and virtual, upright images beyond the focal point. Convex mirrors always form virtual, upright images that are smaller than the object. Diagrams demonstrate the ray tracing method for different object positions with concave and convex mirrors.
Spherical Mirrors
The document discusses different optical devices including lenses, mirrors, and prisms. It focuses on spherical mirrors, describing the two types - concave and convex mirrors. Key details are provided on the center of curvature, radius of curvature, principal axis, pole, focus, and focal length. The mirror formula relating object distance, image distance, and focal length is defined. Characteristics of images formed by concave and convex mirrors in different situations are explained. Uses of concave and convex mirrors are also noted.
Reflection and refraction
1) Light behaves both as a wave and particle. It undergoes various phenomena like reflection, refraction, diffraction etc. which were explained by wave theory.
2) Reflection of light follows the laws - the angle of incidence equals the angle of reflection, and the incident ray, normal and reflected ray lie in the same plane. Reflection can be regular from smooth surfaces or diffuse from rough surfaces.
3) Spherical mirrors are either concave or convex. Concave mirrors converge parallel rays to a focal point, while convex mirrors diverge them from a focal point behind the mirror. Images formed depend on the position of the object.
Geometrical Optics QA 1
JEE Physics/ Lakshmikanta Satapathy/ Ray Optics part 1/ Question on Image formation by a plane mirror of finite thickness solved using the concept of real depth and apparent depth
Converging Mirror And Diverging Mirror
The document summarizes the properties of converging and diverging mirrors. It discusses the characteristics of converging mirrors such as having a concave reflecting surface and forming real, inverted images. Rules for ray diagrams and image formation based on the object's position relative to the mirror's focal point and center of curvature are provided. Properties of images formed by diverging mirrors, which have a convex reflecting surface, are also covered. Formulas for calculating mirror equations and image characteristics are presented. Practice problems demonstrate applying the concepts and formulas to example scenarios.
Refraction of light at a plane surface
This document contains important theory questions about refraction of light at a plane surface and total internal reflection. It includes 24 multiple choice and derivation questions covering topics such as Snell's law, refractive index, critical angle, total internal reflection, mirages, reflecting prisms, reversing prisms, erecting prisms, optical fibers, and their applications. The document was prepared by Mukesh N Tekwani and provides a comprehensive review of key concepts and formulas relating to the refraction and total internal reflection of light.
Light lessons
The document discusses properties of light, mirrors, and lenses. It states that we see objects because light reflects off of them. Mirrors can be flat, concave, or convex, and convex mirrors cause light to diverge while concave mirrors cause light to converge. Refraction is a change in light's direction and speed, and lenses and eyeglasses work by changing light's direction.
Curved mirrors
This document discusses curved mirrors and their properties. It notes that curved mirrors have surfaces shaped like parts of spheres and defines convex and concave mirrors. Convex mirrors bulge outward and produce virtual images, while concave mirrors bulge inward and can produce real or virtual images depending on the object position. Examples of uses of each type of mirror are provided, such as passenger side car mirrors using convex mirrors and telescopes and makeup mirrors using concave mirrors. The key differences in image formation between convex and concave mirrors are also summarized.
Reflection of light (Physics)
Light propagates in straight lines and can be reflected, refracted, and diffracted when interacting with matter. Reflection occurs when light hits a smooth surface and bounces back into the same medium at the same angle. Regular reflection occurs from plane mirrors where the angle of incidence equals the angle of reflection. Spherical mirrors can be concave or convex. Concave mirrors form real, inverted images, while convex mirrors form virtual, upright images. The mirror equation relates the focal length and distances of the object and image.
Convex Mirror
This document discusses convex mirrors and how images are formed using ray tracing. It explains that a convex mirror's reflecting surface bulges outward and that images formed in convex mirrors are always virtual, upright, and smaller than the object. The document uses ray tracing diagrams to show how parallel, focal, and straight rays reflect off a convex mirror and locate the virtual image. Applications of convex mirrors mentioned include makeup/shaving mirrors and wide-angle mirrors used on cars or at blind intersections.
refraction of light at curved surfaces
This document provides information about refraction of light at curved surfaces and lenses. It defines key terms like radius of curvature, principal axis, focal length. It describes the properties and image formation characteristics of convex and concave lenses. The lens formula and lens maker's formula are provided. Multiple choice questions at the end test the understanding of concepts like image formation by lenses and mirrors, properties of convex, concave and plane mirrors, and characteristics of lenses.
Reflection power point
This document discusses reflection of light and images formed by flat mirrors. It distinguishes between specular and diffuse reflection, with specular occurring from smooth surfaces and diffuse from rough surfaces. The law of reflection is explained, which states that the angle of incidence equals the angle of reflection. Real images are formed when light rays converge at the image point, while virtual images appear to come from the point but do not involve light ray convergence.
Reflection
The document discusses the reflection of light, including:
1) Luminous objects generate their own light, while illuminated objects reflect light from other sources.
2) The law of reflection states that the angle of incidence equals the angle of reflection.
3) Plane mirrors form virtual images that appear to be located behind the mirror and are the same distance behind the mirror as the object is in front.
Opticsandlight
Light can be produced through natural and artificial means. It exhibits properties of reflection, refraction, and wavelength. The human eye detects visible light and uses lenses and color-sensitive cells to form images and see color. Emerging technologies like LEDs and OLEDs use electricity to produce light through electroluminescence, while older light sources like incandescent and fluorescent bulbs work through heating and gas excitation. Proper understanding of light, vision, and lighting enables evaluation of their technological impacts.
Activity on reflection
The document provides teaching notes for an experiment that uses a light box, mirror, and protractor to have students discover that the angle of incidence of light hitting a mirror is equal to the angle of reflection. Students will send single rays of light at a mirror from different angles, mark the reflected rays, measure the angles of incidence and reflection, and determine that the two angles are equal for each ray, leading to the discovery of the law of reflection. The experiment is designed for middle school students to help them understand how light reflects in a predictable way from mirrors.
15light
1. Light travels in a straight line. An experiment using a pipe or tube shows that light from a candle cannot be seen if the pipe is bent.
2. When light hits a mirror, it changes direction in a process called reflection. An experiment with a torch and mirror demonstrates how the light direction changes as the torch is moved.
3. A plane mirror forms an image that is erect, the same size as the object, and the same distance from the mirror as the object. The image is virtual and left and right are reversed.
08 lens equations
This document defines key lens terminology and equations for thin lenses. It provides:
1) Definitions for lens terminology including focal length (f), object distance (d0), image distance (di), object height (h0), and image height (hi).
2) The thin lens equations relating focal length, object distance, and image distance.
3) The magnification equation relating image height and object height.
4) Two examples calculating image location and magnification using the equations.
Class 10 light - convex mirror
This document discusses ray diagrams and image formation using convex mirrors. It defines key terms like focal length and explains the characteristics of images formed by convex mirrors - always virtual, erect, diminished, and located between the pole and focus. Convex mirrors act as diverging mirrors and form images this way. The document also discusses uses of convex mirrors like in rear view mirrors in vehicles and the disadvantages of this application. In the end, it provides a recap of key concepts and formulas for mirrors.
Chapter 10 introduction lenses
This document discusses lenses and their properties. It defines convex and concave lenses, and explains that convex lenses converge light rays while concave lenses diverge them. It then describes the six cases of image formation by a convex lens depending on the object's position, including real/virtual and inverted/upright properties. Sign conventions for thin lens equations are also provided. The document contains questions related to identifying lens types, drawing ray diagrams, and calculating thin lens image characteristics.
Convex concave ray diagrams
This document provides information about ray diagrams and image formation using spherical mirrors. It discusses the key terms including principal axis, focus, center of curvature and explains how to use ray diagrams to determine the location, orientation, size and type of images formed by concave and convex mirrors in different configurations. Five cases of image formation using a concave mirror and one case using a convex mirror are described through diagrams and explanations of how the light rays behave. The document also includes examples for readers to practice locating and describing images.
14 ray diagrams
This document provides an overview of ray diagrams and optics concepts like reflection, refraction, mirrors and lenses. It begins by defining a ray of light and discussing how vision works. Key points about plane mirrors, spherical mirrors and their properties are outlined. Concave and convex mirrors and lenses are then explained through examples of how light rays behave and where images form. Readers are prompted to draw their own ray diagrams to practice locating images. In the end, additional resources on optics are recommended for further learning.
Pepsi arnell-021109ere
This document provides an overview of the BREATHTAKING design strategy for PepsiCo. It discusses investigating PepsiCo's brand heritage and DNA to develop a new trajectory that moves from convention to innovation. The strategy is based on universal design principles and proportions found in nature, art, architecture, and PepsiCo's own packaging history. It outlines developing an iconic geometric shape for PepsiCo derived from its earliest forms and proportions to retain the best of its history. The strategy also discusses applying these principles and PepsiCo's DNA to create a multi-dimensional brand identity and gravitational pull to shift consumer experience.
Perspective
1. Perspective is a versatile drawing technique that designers use to quickly present ideas to clients. A simple sketch in perspective can convey basic details of an initial design concept.
2. There are different styles of perspective drawing, including single point and two point perspective. Single point perspective involves drawing lines from the corners of an object to a single vanishing point to construct the 3D form.
3. The example shows how to draw a cube in single point perspective by first drawing one side and selecting a vanishing point, then drawing faint lines from each corner to that point, and finally adding horizontal and vertical lines for the back. This technique can then be used to draw more complex perspective drawings with practice.
Chapter01
This document discusses basic design principles for Photoshop projects, including employing the five W's and one H to develop a project plan, creating task lists to allocate work, understanding the iterative design process as a helix, using compositional techniques like the rule of thirds and golden rectangle, how pixels and exposure work, and techniques like bracketing, HDR, and controlling depth of field.
Refraction of light at spherical surfaces of lenses
This document contains 15 important theory questions about refraction of light at spherical surfaces and lenses. It includes questions about sign convention in optics, the optical center of a lens, focal length of concave and convex lenses, lens maker's formula, derivation of expressions for refraction at single spherical surfaces and thin lens combinations, linear magnification by a lens, location of a virtual image formed by a convex lens based on focal length, dependence of focal length on wavelength, definition and unit of power of a lens, definition of 1 dioptre, formula for combined power of two lenses in contact, and laws governing image formation by lenses. The questions cover key concepts like derivation, definition, diagrams, formulas, and image formation.
Questioons on Optics_ For CBSE Students
This document contains an optics test paper with 30 short answer questions and 10 long answer/numerical questions. The short answer questions cover topics like reflection, refraction, lenses, optical instruments, interference, diffraction and polarization. The long answer questions require explaining concepts in more detail with diagrams, including topics like total internal reflection, compound microscope, prism, defects of vision, diffraction and astronomical telescope. There are also 10 numerical problems related to mirrors, prisms, lenses and instruments.
RAY OPTICS 12 -12-2023.pdf for class 12th students
This document contains a multiple choice test on ray optics concepts. It includes 17 multiple choice questions testing understanding of topics like lenses, mirrors, dispersion, refraction, telescopes and microscopes. The questions cover properties of lenses, principles of minimum deviation, magnification calculations, applications of total internal reflection and differences between various optical instruments. An answer key is provided at the end listing the correct option for each question.
Ch32 ssm
This document contains conceptual problems and their solutions related to optical images formed by mirrors and lenses. For concave mirrors, it discusses that the virtual image size depends on the object distance, and real images are possible. Convex mirrors never form real images. A concave mirror can form enlarged real images if the object is between the center of curvature and focal point. Plane mirrors form virtual images, and the eye location range to see the image is discussed. Spherical mirrors equations relate image and object distances. Refraction through a fish bowl or glass rod immersed in water is analyzed. A double concave lens problem applies lens equations to find the focal length, image location and size, and determines if the image is real/virtual and
More Related Content
What's hot
Light lessons
The document discusses properties of light, mirrors, and lenses. It states that we see objects because light reflects off of them. Mirrors can be flat, concave, or convex, and convex mirrors cause light to diverge while concave mirrors cause light to converge. Refraction is a change in light's direction and speed, and lenses and eyeglasses work by changing light's direction.
Curved mirrors
This document discusses curved mirrors and their properties. It notes that curved mirrors have surfaces shaped like parts of spheres and defines convex and concave mirrors. Convex mirrors bulge outward and produce virtual images, while concave mirrors bulge inward and can produce real or virtual images depending on the object position. Examples of uses of each type of mirror are provided, such as passenger side car mirrors using convex mirrors and telescopes and makeup mirrors using concave mirrors. The key differences in image formation between convex and concave mirrors are also summarized.
Reflection of light (Physics)
Light propagates in straight lines and can be reflected, refracted, and diffracted when interacting with matter. Reflection occurs when light hits a smooth surface and bounces back into the same medium at the same angle. Regular reflection occurs from plane mirrors where the angle of incidence equals the angle of reflection. Spherical mirrors can be concave or convex. Concave mirrors form real, inverted images, while convex mirrors form virtual, upright images. The mirror equation relates the focal length and distances of the object and image.
Convex Mirror
This document discusses convex mirrors and how images are formed using ray tracing. It explains that a convex mirror's reflecting surface bulges outward and that images formed in convex mirrors are always virtual, upright, and smaller than the object. The document uses ray tracing diagrams to show how parallel, focal, and straight rays reflect off a convex mirror and locate the virtual image. Applications of convex mirrors mentioned include makeup/shaving mirrors and wide-angle mirrors used on cars or at blind intersections.
refraction of light at curved surfaces
This document provides information about refraction of light at curved surfaces and lenses. It defines key terms like radius of curvature, principal axis, focal length. It describes the properties and image formation characteristics of convex and concave lenses. The lens formula and lens maker's formula are provided. Multiple choice questions at the end test the understanding of concepts like image formation by lenses and mirrors, properties of convex, concave and plane mirrors, and characteristics of lenses.
Reflection power point
This document discusses reflection of light and images formed by flat mirrors. It distinguishes between specular and diffuse reflection, with specular occurring from smooth surfaces and diffuse from rough surfaces. The law of reflection is explained, which states that the angle of incidence equals the angle of reflection. Real images are formed when light rays converge at the image point, while virtual images appear to come from the point but do not involve light ray convergence.
Reflection
The document discusses the reflection of light, including:
1) Luminous objects generate their own light, while illuminated objects reflect light from other sources.
2) The law of reflection states that the angle of incidence equals the angle of reflection.
3) Plane mirrors form virtual images that appear to be located behind the mirror and are the same distance behind the mirror as the object is in front.
Opticsandlight
Light can be produced through natural and artificial means. It exhibits properties of reflection, refraction, and wavelength. The human eye detects visible light and uses lenses and color-sensitive cells to form images and see color. Emerging technologies like LEDs and OLEDs use electricity to produce light through electroluminescence, while older light sources like incandescent and fluorescent bulbs work through heating and gas excitation. Proper understanding of light, vision, and lighting enables evaluation of their technological impacts.
Activity on reflection
The document provides teaching notes for an experiment that uses a light box, mirror, and protractor to have students discover that the angle of incidence of light hitting a mirror is equal to the angle of reflection. Students will send single rays of light at a mirror from different angles, mark the reflected rays, measure the angles of incidence and reflection, and determine that the two angles are equal for each ray, leading to the discovery of the law of reflection. The experiment is designed for middle school students to help them understand how light reflects in a predictable way from mirrors.
15light
1. Light travels in a straight line. An experiment using a pipe or tube shows that light from a candle cannot be seen if the pipe is bent.
2. When light hits a mirror, it changes direction in a process called reflection. An experiment with a torch and mirror demonstrates how the light direction changes as the torch is moved.
3. A plane mirror forms an image that is erect, the same size as the object, and the same distance from the mirror as the object. The image is virtual and left and right are reversed.
08 lens equations
This document defines key lens terminology and equations for thin lenses. It provides:
1) Definitions for lens terminology including focal length (f), object distance (d0), image distance (di), object height (h0), and image height (hi).
2) The thin lens equations relating focal length, object distance, and image distance.
3) The magnification equation relating image height and object height.
4) Two examples calculating image location and magnification using the equations.
Class 10 light - convex mirror
This document discusses ray diagrams and image formation using convex mirrors. It defines key terms like focal length and explains the characteristics of images formed by convex mirrors - always virtual, erect, diminished, and located between the pole and focus. Convex mirrors act as diverging mirrors and form images this way. The document also discusses uses of convex mirrors like in rear view mirrors in vehicles and the disadvantages of this application. In the end, it provides a recap of key concepts and formulas for mirrors.
Chapter 10 introduction lenses
This document discusses lenses and their properties. It defines convex and concave lenses, and explains that convex lenses converge light rays while concave lenses diverge them. It then describes the six cases of image formation by a convex lens depending on the object's position, including real/virtual and inverted/upright properties. Sign conventions for thin lens equations are also provided. The document contains questions related to identifying lens types, drawing ray diagrams, and calculating thin lens image characteristics.
Convex concave ray diagrams
This document provides information about ray diagrams and image formation using spherical mirrors. It discusses the key terms including principal axis, focus, center of curvature and explains how to use ray diagrams to determine the location, orientation, size and type of images formed by concave and convex mirrors in different configurations. Five cases of image formation using a concave mirror and one case using a convex mirror are described through diagrams and explanations of how the light rays behave. The document also includes examples for readers to practice locating and describing images.
14 ray diagrams
This document provides an overview of ray diagrams and optics concepts like reflection, refraction, mirrors and lenses. It begins by defining a ray of light and discussing how vision works. Key points about plane mirrors, spherical mirrors and their properties are outlined. Concave and convex mirrors and lenses are then explained through examples of how light rays behave and where images form. Readers are prompted to draw their own ray diagrams to practice locating images. In the end, additional resources on optics are recommended for further learning.
Pepsi arnell-021109ere
This document provides an overview of the BREATHTAKING design strategy for PepsiCo. It discusses investigating PepsiCo's brand heritage and DNA to develop a new trajectory that moves from convention to innovation. The strategy is based on universal design principles and proportions found in nature, art, architecture, and PepsiCo's own packaging history. It outlines developing an iconic geometric shape for PepsiCo derived from its earliest forms and proportions to retain the best of its history. The strategy also discusses applying these principles and PepsiCo's DNA to create a multi-dimensional brand identity and gravitational pull to shift consumer experience.
Perspective
1. Perspective is a versatile drawing technique that designers use to quickly present ideas to clients. A simple sketch in perspective can convey basic details of an initial design concept.
2. There are different styles of perspective drawing, including single point and two point perspective. Single point perspective involves drawing lines from the corners of an object to a single vanishing point to construct the 3D form.
3. The example shows how to draw a cube in single point perspective by first drawing one side and selecting a vanishing point, then drawing faint lines from each corner to that point, and finally adding horizontal and vertical lines for the back. This technique can then be used to draw more complex perspective drawings with practice.
Chapter01
This document discusses basic design principles for Photoshop projects, including employing the five W's and one H to develop a project plan, creating task lists to allocate work, understanding the iterative design process as a helix, using compositional techniques like the rule of thirds and golden rectangle, how pixels and exposure work, and techniques like bracketing, HDR, and controlling depth of field.
Refraction of light at spherical surfaces of lenses
This document contains 15 important theory questions about refraction of light at spherical surfaces and lenses. It includes questions about sign convention in optics, the optical center of a lens, focal length of concave and convex lenses, lens maker's formula, derivation of expressions for refraction at single spherical surfaces and thin lens combinations, linear magnification by a lens, location of a virtual image formed by a convex lens based on focal length, dependence of focal length on wavelength, definition and unit of power of a lens, definition of 1 dioptre, formula for combined power of two lenses in contact, and laws governing image formation by lenses. The questions cover key concepts like derivation, definition, diagrams, formulas, and image formation.
What's hot (19)
Refraction of light at spherical surfaces of lenses
Refraction of light at spherical surfaces of lenses
Similar to Light
Questioons on Optics_ For CBSE Students
This document contains an optics test paper with 30 short answer questions and 10 long answer/numerical questions. The short answer questions cover topics like reflection, refraction, lenses, optical instruments, interference, diffraction and polarization. The long answer questions require explaining concepts in more detail with diagrams, including topics like total internal reflection, compound microscope, prism, defects of vision, diffraction and astronomical telescope. There are also 10 numerical problems related to mirrors, prisms, lenses and instruments.
RAY OPTICS 12 -12-2023.pdf for class 12th students
This document contains a multiple choice test on ray optics concepts. It includes 17 multiple choice questions testing understanding of topics like lenses, mirrors, dispersion, refraction, telescopes and microscopes. The questions cover properties of lenses, principles of minimum deviation, magnification calculations, applications of total internal reflection and differences between various optical instruments. An answer key is provided at the end listing the correct option for each question.
Ch32 ssm
This document contains conceptual problems and their solutions related to optical images formed by mirrors and lenses. For concave mirrors, it discusses that the virtual image size depends on the object distance, and real images are possible. Convex mirrors never form real images. A concave mirror can form enlarged real images if the object is between the center of curvature and focal point. Plane mirrors form virtual images, and the eye location range to see the image is discussed. Spherical mirrors equations relate image and object distances. Refraction through a fish bowl or glass rod immersed in water is analyzed. A double concave lens problem applies lens equations to find the focal length, image location and size, and determines if the image is real/virtual and
Ch 25 Light Reflection: Mirrors
The document summarizes key concepts about the reflection of light by plane and spherical mirrors, including:
1) Plane mirrors form virtual, upright images that are the same size as the object and located the same distance behind the mirror as the object is in front of it.
2) Spherical mirrors can form real or virtual images, depending on whether the mirror is convex or concave. Concave mirrors always form virtual images while convex mirrors form real images.
3) Ray diagrams can be used to locate the image position by tracing the path of light rays reflecting off the mirror according to the law of reflection.
روعه Exellent P P Reflection Of Light
The document discusses reflection of light off mirrors and how images are formed by plane mirrors. It defines key terms like incident ray, reflected ray, normal, angle of incidence, angle of reflection. It explains that the angle of incidence equals the angle of reflection. Images formed in mirrors are virtual, meaning they cannot be projected but appear behind the mirror. The position of the image is the same distance behind the mirror as the object is in front of it. Examples and questions are provided to illustrate these concepts.
Light
- Reflection of light occurs when light bounces off a surface. The angle of incidence is equal to the angle of reflection.
- Refraction occurs when light changes speed and direction as it passes from one medium to another. The ratio of the sines of the angles of incidence and refraction is a constant value called the refractive index.
- Experiments can show that light reflects according to the law of reflection and refracts at different angles depending on the medium, such as when passing through glass blocks. Measurements are used to determine refractive indices.
2. reflection (solved example + exercise)
This document contains 20 solved examples related to the concepts of reflection.
The examples cover topics like laws of reflection, image formation using plane and curved mirrors, relative motion of object and image in plane mirrors, and numerical problems to calculate angles of incidence and reflection, focal length of curved mirrors, position and nature of images. Detailed step-by-step solutions are provided for each example.
The examples range from basic to slightly complex, involving application of mirror equations, concept of virtual objects and images, and relative motion concepts to solve problems related to reflection of light.
Reflection and refraction at home & curved surfaces
This document discusses reflection and refraction at surfaces and curved surfaces. It begins by explaining the fundamentals of reflection, refraction, and total internal reflection. It then discusses the laws of reflection and refraction. Specific examples of reflection and refraction are provided for plane mirrors, convex mirrors, concave mirrors, and refraction through lenses and the cornea. Clinical applications of reflection and refraction in the eye and optical instruments are described.
01 ray-optics-mm
1. The document discusses reflection of light from plane and curved mirrors. It defines key terms used to describe reflection such as focal length, radius of curvature, and magnification.
2. Rules for image formation by curved mirrors are presented, including the location, size, and nature of the image for different positions of the object in front of concave and convex mirrors.
3. Examples with solutions are provided to illustrate concepts such as reflection angles, number of images formed by inclined mirrors, and speeds of moving mirrors and images.
Chapter 3 physics
The document summarizes key concepts about reflection of light by different surfaces including mirrors and lenses. It defines important terminology used to describe reflection such as focal length, radius of curvature, angle of incidence, and angle of reflection. Examples are given of the different types of images - real, virtual, enlarged, diminished - formed by concave and convex mirrors depending on the position of the object. Multiple choice questions are also provided to test understanding of these concepts.
CLASS X SCIENCE STUDY MATERIAL
This document contains 10 multiple choice and numerical questions related to refraction and lenses. Some key points covered include:
1. A ray diagram showing that the angle of incidence equals the angle of emergence when a light ray passes through a rectangular glass slab.
2. Ray diagrams for light passing through the optical center, parallel to the principal axis, and directed at the principal focus of a convex lens.
3. Calculations of refractive indices and ray diagrams showing refraction at an interface between water and alcohol.
4. Determining the focal length of a convex lens from observations of an object's distance from the lens and the image's distance.
5. Identifying the type of lens that can
Reflection of light
The document defines key terms related to the reflection of light such as normal, angle of incidence, and angle of reflection. It states that the angle of incidence is equal to the angle of reflection and uses this principle in calculations and measurements. Examples are provided to demonstrate calculating angles of incidence and reflection from diagrams of light rays reflecting off plane mirrors.
Tenth class-state syllabus-model paper-em-ap-physical science
This document contains a general science exam paper with four sections - Section I contains multiple choice and short answer questions worth 10 marks, Section II contains short answer questions worth 4 marks, Section III contains short answer questions worth 16 marks, and Section IV contains a five mark question. The paper also includes a separate section with 20 multiple choice questions worth 10 marks. The summary provides an overview of the structure and content of the exam paper in 3 sentences.
introduction of mirror and lesson and ray diagramming
This chapter discusses geometrical optics and covers the following topics:
- The laws of reflection and refraction, including how to predict the direction of reflected light and characterize different optical components.
- How to distinguish between converging and diverging spherical mirrors and lenses, describe image characteristics, and determine image properties using ray diagrams and equations.
- How lenses can be combined to form optical instruments and how to calculate the power of a lens.
- Key concepts are defined, such as specular and diffuse reflection, real and virtual images, and the characteristics of plane mirrors, spherical mirrors, and lenses.
- Formulas for spherical mirrors and thin lenses are introduced to analyze image formation.
optic
1. The document discusses optics and electromagnetics waves, including the laws of reflection and refraction of light, and properties of lenses and mirrors. Reflection follows the law that the incident, reflected, and normal lines are in the same plane, with the incident and reflection angles being equal. Refraction follows Snell's law, with the ratio of sines of the incident and refracted angles being a constant called the index of refraction.
2. Concave and convex mirrors and lenses are described. Concave mirrors can form real or virtual images, depending on the position of the object. Convex mirrors always form virtual images. Lenses follow principal rays to determine image characteristics.
3. Total
Optic
The document discusses optics and electromagnetics waves. It covers the topics of reflection, refraction, lenses, and mirrors. Key points include:
- Reflection follows the law that the incident, reflected, and normal lines all lie in the same plane, with the incident angle equaling the reflection angle.
- Refraction follows Snell's law, with the ratio of sines of the incident and refracted angles staying constant depending on the medium. Total internal reflection can occur when the incident angle exceeds the critical angle.
- Lenses are classified as converging or diverging based on whether they focus or spread light. Their focal lengths and image properties can be determined using lens formulas that involve the
Optic
The document discusses optics and electromagnetics waves. It covers the laws of reflection and refraction, including the reflection and refraction of light by mirrors and lenses. Several examples are provided on determining image formation and properties using the lens and mirror formulas. Reflection is discussed for flat, concave, and convex mirrors. Refraction addresses Snell's law, total internal reflection, and refraction through parallel planes and spherical surfaces. Lens types and their focal properties are also outlined. Exercises at the end provide problems to calculate variables like image distance, magnification, and focal length.
Lec 4_Energy Light_L1.pdf
This document discusses electromagnetic waves and light. It begins by explaining the nature and properties of electromagnetic waves, including their speed in a vacuum and relationship between wavelength and frequency. It then discusses the electromagnetic spectrum and uses examples to show how to calculate the wavelength range of visible light. Other topics covered include the speed of light as predicted by Maxwell, wave fronts and rays, reflection and refraction of light, spherical mirrors and image formation, lenses, and the thin lens equation. Diagrams and examples are provided to illustrate key concepts and relationships like Snell's law, total internal reflection, dispersion of light through prisms, and image formation using mirrors and lenses.
B al
This document contains a physics exam for 10th grade students divided into 3 sections. Section A contains 17 multiple choice questions to be completed in 30 minutes. Section B contains 21 short answer questions, where students must answer 14 of them in 2.5 hours. Section C contains 3 long answer questions, where students must answer 2 of them. The document provides instructions for each section and lists the questions for sections A and B. It does not include the content of the long answer questions for section C.
Physics 504 chapter 1 & 2 opticks
1) Light reflects off surfaces according to the laws of reflection - the incident ray, normal, and reflected ray all lie in the same plane and the angle of incidence equals the angle of reflection.
2) Plane mirrors form virtual, upright images that are the same distance behind the mirror as the object is in front. Concave mirrors can form real or virtual images, depending on the position of the object.
3) Convex mirrors always form smaller, virtual, and upright images of objects and are commonly used in automotive rear-view mirrors and security mirrors.
Similar to Light (20)
RAY OPTICS 12 -12-2023.pdf for class 12th students
RAY OPTICS 12 -12-2023.pdf for class 12th students
Reflection and refraction at home & curved surfaces
Reflection and refraction at home & curved surfaces
Tenth class-state syllabus-model paper-em-ap-physical science
Tenth class-state syllabus-model paper-em-ap-physical science
introduction of mirror and lesson and ray diagramming
introduction of mirror and lesson and ray diagramming
More from Jaspreet Kaur Kalsi
Back excercise of change around us
1. Some changes, like folding a dress or drawing with pencil, can be reversed by unfolding or erasing. Other changes, like breaking a toy or using a permanent marker, cannot be reversed.
2. Changes like melting ice or dissolving sugar can be reversed by freezing water or evaporating the water. Irreversible changes include sawing wood, cooking food, or the ripening of fruit.
3. Heating materials like tar, rims, or cement causes chemical changes that cannot be reversed, while simply heating items to expand them, like a rim on a wheel, can be reversed by cooling.
Separation of substances
This ppt is completely based on the 5E approach to learning. This ppt is useful to enhance the higher order skill and also one video is attached to it so that you can learn the concept easily. and prepare for class test and competition.
Worksheet on rational number square root cube root
In this you can resolve the problems in the learning of Integers. and you can use it as a worksheet in your classroom
15918 right to education
This is helpful for competitive exams and also to increase the General knowledge and this ppt is in two language first in English and second is in Hindi helpful for everyone to understand. and helpful for PTET, CTET, UPSC and other exams
Mcq on synthetic fibres plastic coal and petroleum material metals non metals
In this worksheet you find the MCQ based on Synthetic fibers, coal and petroleum& metals and non-metals. These are helpful for CTET, PTET, JEE, and other competitive exams
Revision of crops
In this ppt you can learn about the Crop by the different type of questions which help you in board as well as competitive exam
Achievementtests 121026070325-phpapp01
How can you construct an Achievement test. You can take help of this ppt to learn this. In this ppt the we talk about Functions, characteristics and type of tests we can make.
(Unit 1) 11072 appraches of curriculum construction
This file is helpful in understanding the concept of curriculum. How a curriculum can be constructed and also approaches required for curriculum.
Ict future education
This ppt help you in understanding the role of ICT in education. How a teacher can use the technology to increase the teaching learning process. Also chalk and board in not a 21st century learning because now a days learning is done on smart board
Account defination
Account terms refer to records kept of income, expenditures, savings, and balances. In schools, seven types of accounts track money from fees, fines, the library, expenditures, savings, administrative payments, and funds. School accounts are managed through fee heads that identify what students pay for, such as tuition, libraries, maintenance, and sports.
Comparison of comission with pseb submiitted by jaspreet kaur
It is helpful for those who wants to design the curriculum for different classes.
And for those who wants to know the actual implication of commission policy made by government to improve EDUCATION
MCQ on Acids, Bases and Salts
This document contains a 13 question multiple choice quiz about acids, bases, and salts. It tests knowledge about the characteristic properties of acids, how strong and weak acids behave in solution, pH levels of carbonated drinks and milk of lime, examples of mixed and soluble salts, and reactions of acids and bases. The answers to each multiple choice question are provided at the end.
Curriculum
It is very helpful in understanding the construction of curriculum for school level for both science and math.
if you are teacher it is helpful in preparing the content of teaching and also helpful for improving teachimg learning process
Profit and Loss
If you want to clear your basics you can go through this, it is helpful in preparation of competitive exams, because the setup of question are according to competitive exams.
Simple and compound interest
This ppt is helpful in clearing a basic concepts regarding this topic.
Also if you are preparing for competitive exams go through the MCQ given in this ppt.
Compittitve exams like CTET, PTET, SSC, JEE, etc.
Structure of atom jaspreet
By this you can understand the actual concept of Atom and also the hidden facts behind it discovery, some you tube links are also their to increase the student knowledge
E content on acids,bases & salts jaspreet
By this ppt you can understand the whole concept and some you tube links are also available btter understanding of concept
Pi presentation jaspreet
Pi is the ratio of a circle's circumference to its diameter. It was first discovered around 250 BC by Archimedes, who calculated upper and lower bounds for pi. Over centuries, many mathematicians have calculated pi to increasing levels of accuracy using polygon and series methods. In the modern era, computers have been used to calculate pi to trillions of digits. Pi is an irrational and transcendental number that is ubiquitous in mathematics and physics, appearing in formulas relating to circles, spheres, trigonometry, and more.
Pi presentation jaspreet
Pi is the ratio of a circle's circumference to its diameter. It was first discovered around 250 BC by Archimedes, who calculated upper and lower bounds for pi. Over centuries, many mathematicians have calculated pi to increasing levels of accuracy using polygon approximations of circles. In the modern era, computers have been used to calculate pi to trillions of digits. Pi is an irrational and transcendental number that is ubiquitous in formulas relating to circles, spheres, and trigonometry.
More from Jaspreet Kaur Kalsi (19)
Worksheet on rational number square root cube root
Worksheet on rational number square root cube root
Mcq on synthetic fibres plastic coal and petroleum material metals non metals
Mcq on synthetic fibres plastic coal and petroleum material metals non metals
(Unit 1) 11072 appraches of curriculum construction
(Unit 1) 11072 appraches of curriculum construction
Comparison of comission with pseb submiitted by jaspreet kaur
Comparison of comission with pseb submiitted by jaspreet kaur
Recently uploaded
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশের অর্থনৈতিক সমীক্ষা ২০২৪ [Bangladesh Economic Review 2024 Bangla.pdf] কম্পিউটার , ট্যাব ও স্মার্ট ফোন ভার্সন সহ সম্পূর্ণ বাংলা ই-বুক বা pdf বই " সুচিপত্র ...বুকমার্ক মেনু 🔖 ও হাইপার লিংক মেনু 📝👆 যুক্ত ..
আমাদের সবার জন্য খুব খুব গুরুত্বপূর্ণ একটি বই ..বিসিএস, ব্যাংক, ইউনিভার্সিটি ভর্তি ও যে কোন প্রতিযোগিতা মূলক পরীক্ষার জন্য এর খুব ইম্পরট্যান্ট একটি বিষয় ...তাছাড়া বাংলাদেশের সাম্প্রতিক যে কোন ডাটা বা তথ্য এই বইতে পাবেন ...
তাই একজন নাগরিক হিসাবে এই তথ্য গুলো আপনার জানা প্রয়োজন ...।
বিসিএস ও ব্যাংক এর লিখিত পরীক্ষা ...+এছাড়া মাধ্যমিক ও উচ্চমাধ্যমিকের স্টুডেন্টদের জন্য অনেক কাজে আসবে ...
Main Java[All of the Base Concepts}.docx
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
How to Fix the Import Error in the Odoo 17
An import error occurs when a program fails to import a module or library, disrupting its execution. In languages like Python, this issue arises when the specified module cannot be found or accessed, hindering the program's functionality. Resolving import errors is crucial for maintaining smooth software operation and uninterrupted development processes.
The simplified electron and muon model, Oscillating Spacetime: The Foundation...
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
BBR 2024 Summer Sessions Interview Training
Qualitative research interview training by Professor Katrina Pritchard and Dr Helen Williams
Hindi varnamala | hindi alphabet PPT.pdf
हिंदी वर्णमाला पीपीटी, hindi alphabet PPT presentation, hindi varnamala PPT, Hindi Varnamala pdf, हिंदी स्वर, हिंदी व्यंजन, sikhiye hindi varnmala, dr. mulla adam ali, hindi language and literature, hindi alphabet with drawing, hindi alphabet pdf, hindi varnamala for childrens, hindi language, hindi varnamala practice for kids, https://www.drmullaadamali.com
How to Make a Field Mandatory in Odoo 17
In Odoo, making a field required can be done through both Python code and XML views. When you set the required attribute to True in Python code, it makes the field required across all views where it's used. Conversely, when you set the required attribute in XML views, it makes the field required only in the context of that particular view.
How to Manage Your Lost Opportunities in Odoo 17 CRM
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptxMohd Adib Abd Muin, Senior Lecturer at Universiti Utara Malaysia
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
What sets Denis apart is his comprehensive understanding of Business and Systems Analysis technologies, honed through involvement in all phases of the Software Development Lifecycle (SDLC). From meticulous requirements gathering to precise analysis, innovative design, rigorous development, thorough testing, and successful implementation, he has consistently delivered exceptional results.
Throughout his career, he has taken on multifaceted roles, from leading technical project management teams to owning solutions that drive operational excellence. His conscientious and proactive approach is unwavering, whether he is working independently or collaboratively within a team. His ability to connect with colleagues on a personal level underscores his commitment to fostering a harmonious and productive workplace environment.
Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
-------------------------------------------------------------------------------
Find out more about ISO training and certification services
Training: ISO/IEC 27001 Information Security Management System - EN | PECB
ISO/IEC 42001 Artificial Intelligence Management System - EN | PECB
General Data Protection Regulation (GDPR) - Training Courses - EN | PECB
Webinars: https://pecb.com/webinars
Article: https://pecb.com/article
-------------------------------------------------------------------------------
For more information about PECB:
Website: https://pecb.com/
LinkedIn: https://www.linkedin.com/company/pecb/
Facebook: https://www.facebook.com/PECBInternational/
Slideshare: http://www.slideshare.net/PECBCERTIFICATION
Executive Directors Chat Leveraging AI for Diversity, Equity, and Inclusion
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...Nguyen Thanh Tu Collection
https://app.box.com/s/y977uz6bpd3af4qsebv7r9b7s21935vdWalmart Business+ and Spark Good for Nonprofits.pdf
"Learn about all the ways Walmart supports nonprofit organizations.
You will hear from Liz Willett, the Head of Nonprofits, and hear about what Walmart is doing to help nonprofits, including Walmart Business and Spark Good. Walmart Business+ is a new offer for nonprofits that offers discounts and also streamlines nonprofits order and expense tracking, saving time and money.
The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
Community pharmacy- Social and preventive pharmacy UNIT 5
Covered community pharmacy topic of the subject Social and preventive pharmacy for Diploma and Bachelor of pharmacy
Pollock and Snow "DEIA in the Scholarly Landscape, Session One: Setting Expec...
Pollock and Snow "DEIA in the Scholarly Landscape, Session One: Setting Expec...National Information Standards Organization (NISO)
This presentation was provided by Steph Pollock of The American Psychological Association’s Journals Program, and Damita Snow, of The American Society of Civil Engineers (ASCE), for the initial session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session One: 'Setting Expectations: a DEIA Primer,' was held June 6, 2024.Recently uploaded (20)
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
The simplified electron and muon model, Oscillating Spacetime: The Foundation...
The simplified electron and muon model, Oscillating Spacetime: The Foundation...
How to Manage Your Lost Opportunities in Odoo 17 CRM
How to Manage Your Lost Opportunities in Odoo 17 CRM
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
Executive Directors Chat Leveraging AI for Diversity, Equity, and Inclusion
Executive Directors Chat Leveraging AI for Diversity, Equity, and Inclusion
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
Walmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdf
Community pharmacy- Social and preventive pharmacy UNIT 5
Community pharmacy- Social and preventive pharmacy UNIT 5
Liberal Approach to the Study of Indian Politics.pdf
Liberal Approach to the Study of Indian Politics.pdf
Pollock and Snow "DEIA in the Scholarly Landscape, Session One: Setting Expec...
Pollock and Snow "DEIA in the Scholarly Landscape, Session One: Setting Expec...
Light
- 1. LIGHT The Reason behind the visibility
- 2. Let’s Recall What we have learn------
- 3. Explain…. 1. Incident Ray 2. Reflected Ray 3. Incident angle 4. Reflected angle 5. Laws of Reflection
- 8. MCQ: 1. A small hole P is made in a piece of cardboard. The hole is illuminated by a torch. The pencil of light coming out of the hole falls on a mirror. The angle of incident is 90 degree. What will be the angle of reflection: a) 45 b) 90 c) 95 d) None of these
- 9. 2. How many times is a ray of light reflected by two plane mirrors placed parallel and facing each other? a) Infinite number of times b) Two times c) Three times d) None of the above
- 10. 3. A small hole P is made in a piece of cardboard. The hole is illuminated by a torch as shown in Fig. The pencil of light coming out of the hole falls on a mirror. At which point should the eye be placed so that the hole can be seen? (a) D (c) C (b) B (d) A
- 11. 4. A tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in Fig. A, B, C and D. In which position mirror will be visible? a. A c. C b. B d. D
- 12. 5. Light is falling on surface S1, S2, S3 as shown in Fig. Surfaces on which the angle of incidence is equal to the angle of reflection is/are (a) S1 only (b) S2 and S3 (c) S1 and S2 only (d) all the three surfaces
- 13. 6. Image formed by a plane mirror is (a)Virtual, behind the mirror and enlarged (b)Virtual, behind the mirror and of the same size as the object (c)Real at the surface of the mirror and enlarged (d)Real, behind the mirror of the same size as the object
- 14. MCQ solution: 1. (b) 2. (a) 3. (d) 4. (a) 5. (d) 6. (b)
- 15. Short Answer Type: 1. Explain the process which enables us to perceive motion in a cartoon film. 2. How is the phenomenon of reflection used in making a kaleidoscope? What are the applications of a kaleidoscope? 3. Fig. shows the word REST written in two ways in front of a mirror. Show how the word would appear in the mirror.
- 16. 4. There is a mistake in each of the following ray diagrams given as Fig. a, b, and c. Make the necessary correction (s). Explain it
- 17. Solution: 1. The cartoon film we see is actually the projection of static pictures on the screen in a specific order. Usually the static pictures are shown in a sequence at the rate of 24 pictures per second one after the other giving us the perception of movement. 2. The kaleidoscope gives a number of images formed by reflection from the mirrors inclined to one another. Designers and artists use kaleidoscope to get ideas for new patterns to design wallpapers, Jewellery and fabrics.
- 18. Long Answer Type: 1. Boojho planned an activity to observe an object A through pipes as shown in Fig. so that he could see objects which he could not directly see. a) How many mirrors should he use to see the objects? (b) Indicate the positions of the mirrors in the figure. (c) What must be the angle with respect to the incident light at which he should place the mirrors? (d) Indicate the direction of rays in the figure. (e) If any of the mirrors is removed, will he be able to see the objects?
- 19. 2. Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection? 3. State the laws of reflection?
- 20. Solution: 1. (a) Three (b) (c) 450 (e) No, he will not be able to see the objects.
- 21. Regular Reflection 1.It takes place from a smooth place. 2.Reflected rays moves in a particular direction. 3. Example: Reflection by plane mirror. Diffused Reflection 1. It takes place from a rough surface. 2. Reflected rays scattered in random directions. 3. Reflection by road surface. Answer3. Laws of reflection: The angle of incidence is always equal to the angle of reflection. The incident ray, the reflected ray and the normal to the surface at the point of incidence lie in the same plane.