Light Concept Map
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This document contains information about the properties of light, including that light travels much faster than sound, is reflected by shiny surfaces, and can be absorbed, reflected, or refracted when hitting different materials. When light passes from one medium to another, it may refract according to Snell's law, with the wave bending toward the normal in the slower medium and dispersing into a spectrum in a prism.
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Light
This document defines and provides examples of luminous and non-luminous objects, and describes the properties and behavior of light rays, shadows, reflection, refraction, color, and optical instruments like mirrors, prisms, and periscopes. Key terms discussed include transparent, translucent, and opaque materials; angles of incidence and reflection; real and virtual images; absorption and reflection of color; and how rainbows are formed by light refraction in water droplets.
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Light is an electromagnetic wave that consists of oscillating electric and magnetic fields and can travel through space. It spreads in straight lines and carries energy. Light sources such as the sun emit light, while objects that do not emit light themselves are called dark bodies. When light hits surfaces, it can be reflected, absorbed, or pass through depending on whether the surface is opaque, translucent, or transparent. The law of reflection states that the angle of incidence equals the angle of reflection. Shadows form when light rays are blocked by an opaque object.
Refraction of light
This document discusses the physics of refraction of light. Some key points:
- Refraction occurs when light travels from one medium to another with a different density, causing it to change speed and direction. It bends toward the normal when entering a denser medium and away when entering a rarer medium.
- The refractive index of a material is the ratio of the speed of light in a vacuum to its speed in the material. It characterizes how much light bends when entering the material.
- Total internal reflection occurs when light passes from a denser to a rarer medium at an angle greater than the critical angle, causing it to reflect back rather than refract. This principle is used
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Light is a transverse wave consisting of oscillating electric and magnetic fields. It can travel through a vacuum at a constant speed of 3.00 x 10^8 m/s or slower through other media. The energy of light photons varies with frequency, with higher frequency light having higher energy, shorter wavelengths, and higher colors in the visible spectrum from violet to red. Lasers emit coherent, monochromatic light of a single frequency unlike incandescent sources. They have many uses including medicine, information storage, industry, and other applications due to their organized light properties.
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Here are the answers to the quiz:
1. b
2. d
3. b
4. c
5. b
6. a
7. B
8. B
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10. B
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This document summarizes key developments in the understanding of light from ancient Greek philosophers to present day. It describes early theories that light consisted of particles (Pythagoras, Newton) or waves (Aristotle, Huygens, Young), experiments measuring the speed of light (Galileo, Roemer, Maxwell), the establishment of light as electromagnetic radiation, and the modern understanding of light exhibiting both wave and particle properties.
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Light is a form of energy that allows us to see objects. When light reflects off objects and enters our eyes, we see the objects. There are two main types of reflection: irregular/diffused reflection which scatters light in all directions for general illumination, and regular/specular reflection which forms images using smooth, shiny surfaces like mirrors. Spherical mirrors can be either concave which converge light to a focal point, or convex which diverge light appearing to come from a point behind the mirror. The mirror formula relates the object and image distances to the focal length. Concave mirrors are used in flashlights and car headlights while convex mirrors are used as rear view mirrors in vehicles.
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This document defines and provides examples of luminous and non-luminous objects, and describes the properties and behavior of light rays, shadows, reflection, refraction, color, and optical instruments like mirrors, prisms, and periscopes. Key terms discussed include transparent, translucent, and opaque materials; angles of incidence and reflection; real and virtual images; absorption and reflection of color; and how rainbows are formed by light refraction in water droplets.
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In this ppt you will study about light. for Ex what is light and many more thing specially for class seventh and eights CBSE .
Light.ppt
Light is an electromagnetic wave that consists of oscillating electric and magnetic fields and can travel through space. It spreads in straight lines and carries energy. Light sources such as the sun emit light, while objects that do not emit light themselves are called dark bodies. When light hits surfaces, it can be reflected, absorbed, or pass through depending on whether the surface is opaque, translucent, or transparent. The law of reflection states that the angle of incidence equals the angle of reflection. Shadows form when light rays are blocked by an opaque object.
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This document discusses the physics of refraction of light. Some key points:
- Refraction occurs when light travels from one medium to another with a different density, causing it to change speed and direction. It bends toward the normal when entering a denser medium and away when entering a rarer medium.
- The refractive index of a material is the ratio of the speed of light in a vacuum to its speed in the material. It characterizes how much light bends when entering the material.
- Total internal reflection occurs when light passes from a denser to a rarer medium at an angle greater than the critical angle, causing it to reflect back rather than refract. This principle is used
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Light is a transverse wave consisting of oscillating electric and magnetic fields. It can travel through a vacuum at a constant speed of 3.00 x 10^8 m/s or slower through other media. The energy of light photons varies with frequency, with higher frequency light having higher energy, shorter wavelengths, and higher colors in the visible spectrum from violet to red. Lasers emit coherent, monochromatic light of a single frequency unlike incandescent sources. They have many uses including medicine, information storage, industry, and other applications due to their organized light properties.
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This document summarizes key developments in the understanding of light from ancient Greek philosophers to present day. It describes early theories that light consisted of particles (Pythagoras, Newton) or waves (Aristotle, Huygens, Young), experiments measuring the speed of light (Galileo, Roemer, Maxwell), the establishment of light as electromagnetic radiation, and the modern understanding of light exhibiting both wave and particle properties.
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Light is a form of energy that allows us to see objects. When light reflects off objects and enters our eyes, we see the objects. There are two main types of reflection: irregular/diffused reflection which scatters light in all directions for general illumination, and regular/specular reflection which forms images using smooth, shiny surfaces like mirrors. Spherical mirrors can be either concave which converge light to a focal point, or convex which diverge light appearing to come from a point behind the mirror. The mirror formula relates the object and image distances to the focal length. Concave mirrors are used in flashlights and car headlights while convex mirrors are used as rear view mirrors in vehicles.
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Email: parmarshivam105@gmail.com
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- Students will learn about refraction of light rays using a prism, how this causes dispersion and separates white light into the visible color spectrum.
- They will explain how the colors are arranged from red having the lowest energy and being least bent, to violet having the highest energy and being most bent.
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How to Create a More Engaging and Human Online Learning Experience
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BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
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...
Light Concept Map
- 1. Light concept map For the teacher – first slide shows the whole concept map the second slide shows a developing map to be used in teaching the ideas contained in the map.
- 2. 1. Image same size as object. Properties of plane mirror image are:: 2. Image is upright (not inverted). Angle of incidence = angle of reflection 3. Image appears as far behind mirror as it is in front. Law of reflection Reflects Rays Shadow 300 000 000 m/s 343 m/s On plane shiny surface it: Light is represented by: Speed is: Much fast than sound which is Object causes: 1 Absorbed Opaque Luminous example Sun Light When it hits a surface it can be Objects make or reflect light called Substance is: Reflected Transparent Non-Luminous Moon example 2 When is passes into a new medium it is: Object not clear: Translucent Caused by Change in wave speed Refracted In a prism: Law states: Waves are dispersed in to a spectrum. Wave bends towards the normal in the slower medium.
- 3. 1. Image same size as object. Properties of plane mirror image are:: 2. Image is upright (not inverted). Angle of incidence = angle of reflection 3. Image appears as far behind mirror as it is in front. Law of reflection Reflects Rays Shadow 300 000 000 m/s 343 m/s On plane shiny surface it: Light is represented by: Speed is: Much fast than sound which is Object causes: 1 Absorbed Opaque Luminous example Sun Light When it hits a surface it can be Objects make or reflect light called Substance is: Reflected Transparent Non-Luminous Moon example 2 When is passes into a new medium it is: Object not clear: Translucent Caused by Change in wave speed Refracted In a prism: Law states: Waves are dispersed in to a spectrum. Wave bends towards the normal in the slower medium.