In this power point presentation, we discuss about the light, the laws of reflection, how we are able to see things, about human eye and how human vision works. We also talk about application of reflection of light by discussing about periscope and kaleidoscope.
Light prepared by Yasir Khan.
Topic covered :- reflection, laws of reflection, types of images, refraction, multiple images, kaleidoscope, dispersion of light, human eye, defects of vision, cataract, care for eye.
Thank you.
In this power point presentation, we discuss about the light, the laws of reflection, how we are able to see things, about human eye and how human vision works. We also talk about application of reflection of light by discussing about periscope and kaleidoscope.
Light prepared by Yasir Khan.
Topic covered :- reflection, laws of reflection, types of images, refraction, multiple images, kaleidoscope, dispersion of light, human eye, defects of vision, cataract, care for eye.
Thank you.
La chirurgie de la presbytie n'est pas toujours possible avec le laser. Il faut alors envisager une chirurgie du cristallin claire avec des implants multi-focaux. Ceux-ci permettent de corriger la vision de loin et près de manière définitive.
In the realm of biology, the human eye is a marvel of nature's engineering, allowing us to perceive the world around us with clarity and detail. It is not only a sensory organ but also a gateway to understanding the physics of light and color. Class 10 Science introduces students to the intricacies of the human eye and its interaction with light, delving into topics such as refraction, dispersion, and the perception of color. In this detailed study guide, we will explore these concepts comprehensively to aid students in understanding this fascinating aspect of biology and physics.
For more information, visit-www.vavaclasses.com
Eye defects and lenses
The eye is considered normal, or emmetropic, if parallel light rays from distant objects are in sharp focus on the retina when the ciliary muscle is completely relaxed
The normal eye contracts its ciliary muscle to provide for accomodation.
When the eye cannot function properly, the light entering the eye is not brought into sharp focus on the retina.
La chirurgie de la presbytie n'est pas toujours possible avec le laser. Il faut alors envisager une chirurgie du cristallin claire avec des implants multi-focaux. Ceux-ci permettent de corriger la vision de loin et près de manière définitive.
In the realm of biology, the human eye is a marvel of nature's engineering, allowing us to perceive the world around us with clarity and detail. It is not only a sensory organ but also a gateway to understanding the physics of light and color. Class 10 Science introduces students to the intricacies of the human eye and its interaction with light, delving into topics such as refraction, dispersion, and the perception of color. In this detailed study guide, we will explore these concepts comprehensively to aid students in understanding this fascinating aspect of biology and physics.
For more information, visit-www.vavaclasses.com
Eye defects and lenses
The eye is considered normal, or emmetropic, if parallel light rays from distant objects are in sharp focus on the retina when the ciliary muscle is completely relaxed
The normal eye contracts its ciliary muscle to provide for accomodation.
When the eye cannot function properly, the light entering the eye is not brought into sharp focus on the retina.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
3. LATERAL INVERSION
3
Light
For Example You are the object and
what you see in mirror is your
image. You are identical to your
image as seen in the mirror. In case
of a plane mirror the image formed
is erect and same size as the object.
But there is one difference is in your
left and right. When you move your
right hand, in the image it seems as
if your left hand is moving. This is
called lateral inversion, where left
appear be right and right appears to
be left.
4. Light 4
REFLECTING THROUGH SPHERICAL
MIRRORS
If the reflecting surface of
a spherical mirror is
concave, it is called as a
concave mirror. If the
reflecting surface of a
spherical mirror is convex,
it is called a convex
mirror.
5. USES OF SPHERICAL MIRRORS
Convex mirror
Concave mirror
Light 5
Convex mirror
Convex are mainly use at rear side of a car on
driver’s side of a car isa convex mirror. In some
countries, these are labelled with safety warning ,
to warm the driver of the convex mirror’s distorting
effects on actualdistance of the vehicle behindthe
driver
7. Light 7
LAWS OF REFLECTION
•Incident ray – The light ray falling on any
surface is called the incident ray.
•Reflected ray- The light ray that comes
back after reflection is called the reflected
ray.
•Normal ray – The line perpendicular to
the reflecting surface is called the normal
ray.
•Angle of incidence – The angle between
the incident ray and the normal ray is
called the angle of incidence.
•Angle of reflection – the angle between
the reflected ray and the normal ray is
called the angle of reflection.
8. Light 8
REGULAR AND IRREGULAR REFLECTION
The Laws of reflection are valid for
reflection from all shiny surfaces.
Thus the angle of incidence has to
be equal to the angle of reflection
in each case. It is just that the rays
reflected from an irregular surface
are unparallel rays. When the rays
reflected from a plane surfaces are
not parallel, the reflection is known
irregular reflection.
irregular reflection
9. Light 9
regular reflection
On the other hand,
reflection of light rays
from a smooth surface
like that of a plane mirror
is called a regular
reflection Images formed
by regular reflection.
10. Light 10
MULTIPLE REFLECTIONS
To predict the path of
incident rays for this case,
we need to apply the laws
of reflection again.
However, at the same time,
understand that when two
mirrors are placed at an
angle the rays of light are
reflected multiple times
through them. For instance,
when two mirrors are set
parallel facing each other
they will create the illusion
that the image of the
object repeats forever.
11. Light 11
KALEIDOSCOPE –
AN ILLUSTRATION OF
MULTIPLE REFLECTION
The kaleidoscopealsouses
multiplereflections through
mirrors to form beautiful
patterns.
12. SUNLIGHT AND ITS COLOURS
• The seven coloursare violet,
indigo,blue, green, yellow,
orange andred. All thisspectrum
of colours we can perform this
simpleactivity.
Light 12
13. THE HUMAN EYE
The human eye a sense organ. It helps in seeing different
objects. The light reflected from different objects enter
our eyes and thus we can see things around us. It is an
important organ. So, understandings its structure is also
very important.
Light 13
14. The human eye has a nearly spherical shape, and is
about an inch in diameter. The white portion visible from
outside is the cornea. Behind the cornea is a space filled
with a liquid known as aqueous humour. Further behind
is a crystalline lens. Between the aqueous humour and
the lens is the iris, a muscular diaphragm which has a
small hole in it known as the pupil. The pupil usually
appears black, and controls the amount of light entering
the eye.
Light 14
15. ACCOMODATION OF THE EYE
The eye focuses on different objects by changing the
radius of curvature of the lens. The cilliary muscles
relax to view distant objects and contract to focus
on nearby objects. This is knows as the power of
accommodation of the eye. However, the muscles
cannot be strained beyond a limit and hence if the
objects is placed too close to your eyes the image
formed on the retina would be blurred
Light 15
16. PERSISTENCE OF VISION
The imageof an object formed in retina does
not vanish immediately;it stays for 1/16
second. This is called as thepersistence of
vision. Any imagethatis flashedmore than
16 images per second would be seenas
moving.
Light 16
17. DEFFECTS OF THE HUMAN EYE
At times, the eye lens cannot focus even when the
objects is placed beyond 25cm. Some people
cannot see nearby objects clearly and see nearby
objects clearly and see distant objects clearly. This
defect ;is called hypermetropia. There are also
people who can see nearby objects clearly but
face a problem viewing far-off objects. This defect
is called myopia. Thus for such cases the eye lens
has to be corrected using other lenses, and the
doctor asks you to wear spectacles.
Light 17
19. CARE OF YOUR EYES
• You should have regular checkup for
your eyes. If there is any problem,
you should go to an eye specialist. If
advised, use suitable spectacles.
Light 19
20. • Never look directly into a
very bright source of light,
like the sun. It can
damage the retina of the
eye.
Light 20
21. • Never rub your eyes if
some particles dust go
into your eyes, wash
your eyes with clean
water. In case there is no
improvement, visit a
doctor.
Light 21
22. • Wash your eyes frequently with clean
water.
• Always read at the normal distance for
vision. Do not read by bringing your book
too close to your eyes or keeping it too
far. Always read under proper light.
Light 22
23. • Do not read in a moving vehicle.
• Avoid watching television or working on
the computer for long sessions always
take a break to rest your eyes.
Light 23
24. SCRIPT FOR THE VISUALLY
CHALLENGED: THE BRAILLE SYSTEM
• The Braille system is a method thatis widely used by visually
challengedpeople to read and write. It was devised in 1821
by Louis Braille, a blind Frenchmen.Visually challenged
people feel thedots to identify thecharacter writtenin Braille
system.
Light 24
