Light is an electromagnetic wave that travels in waves and particles. It allows objects to be visible by stimulating sight. Light can be reflected, absorbed, or transmitted when it strikes a new medium. It can be refracted, polarized, or scattered during transmission. Materials affect light in different ways and can be transparent, translucent, or opaque. The quantum theory describes light most accurately as traveling in packets of energy called photons.

1. Light, Behavior and its NatureLight, Behavior and its Nature
By; Malik Shahroz Akber

2. LightLight
Light is a energy by which human eye is
sensitive
OR
Light is a natural agent which stimulates
sight and makes things visible

3. LightLight
Without light, nothing is visible.
When you look at fish in the
ocean, you are not seeing fish.
What you are really seeing is
light reflected from the fish!

4. LightLight
Light Is a transverse , electromagnetic wave that can
be seen by human beings.
Energy generated by sun, electric light ,fire travels as
a radiation from source and can be detected by
human eyes.
Two forms of light are:
1- Incandescence light:
2- Luminescence light:

5. Incandescence lightIncandescence light
The emission of light from hot matter is
incandescence light.

6. Luminescence lightLuminescence light
The emission of light ,when excited electrons
fall from higher energy level to low energy
level.

7. A luminous object is one that produces light.
An illuminated object is one that reflects light.
Luminous Object Illuminated Object
Luminous and Illuminated ObjectsLuminous and Illuminated Objects

8. Nature Of LightNature Of Light
Light rays travel in the transparent
medium present in the form of particles
When travel through vacuum present in
the form of wave

9. Materials can be transparent,
translucent, or opaque.
Each type of material affects the
behavior of light in different
ways
Nature Of LightNature Of Light

10. Transparent MaterialsTransparent Materials
A material through which you can see
clearly.
A transparent material transmits light,
which means it allows most of the light
that strikes it to pass through it.
Some examples: windows and fresh water.

12. Translucent MaterialsTranslucent Materials
A material that you can see
through, but the objects you see
through it do not look clear or
distinct.
A translucent
material scatters light.
Example: Jell, Soap

14. Opaque MaterialsOpaque Materials
A material that either absorbs or
reflects all of the light that strikes
it. (It blocks light from passing
through it.)
Most materials are opaque.
Examples: Trees, concrete, metals

15. Interactions of LightInteractions of Light
When light strikes a new medium, the
light can be reflected, absorbed, or
transmitted.
When light is transmitted, it can be
refracted, polarized, or scattered.

16. ReflectionReflection
When you look in a mirror, you see a
clear image of yourself.
An image is a copy of an object formed
by reflected waves of light.
There are two types of reflection : regular
and diffuse.

18. Regular ReflectionRegular Reflection
This occurs when parallel light waves strike a
surface and are all reflected in the same
direction.
Regular reflection happens when light hits a
smooth, polished surface.
-Mirrors and still bodies of water

20. Diffuse ReflectionDiffuse Reflection
This occurs when parallel light waves strike a
rough, uneven surface, and reflect in many
different directions.
When this happens, you can see either a
blurred reflected image or no image at all.
-Rough water, paper.

22. Law of Reflection:Law of Reflection:
Angle of incidence = angle of reflection

23. Transmitting LightTransmitting Light
If light is not reflected, three things
can happen as light passes through
an object:
-Refraction, Polarization, Scattering

24. Refraction= BendingRefraction= Bending
Refraction occurs when waves
bend when it passes at an angle
from one medium into another.
This can also happen to light!
This is seen when you place
objects under water.

26. PolarizationPolarization
Polarization occurs when light waves vibrate in only
one plane.
Light is normally “un-polarized,” meaning it vibrates
in all directions.
Polarizing filters transmit light waves, but they
block all of the light that isn’t vibrating in the
direction it allows through it.

28. PolarizationPolarization
This technology is now used in 3-D
movies!
3-D movies are produced in a way that
makes it so the image that is projected
on the screen is really two images (one
for your right eye, and the other for
your left eye).
This is why, if you take your 3-D
glasses off, you will see a blurry

30. ScatteringScattering
Scattering means that light is
redirected as it passes through a
medium.
The earth’s atmosphere contains many
molecules. When light from the sun
hits these particles, they scatter
the light.
Scattering reddens the sun at sunset
and sunrise.

32. Nature Of LightNature Of Light
The following theories explains the nature of light
THE CORPUSCULAR THEORY
created in seventeen century
By sir Isaac Newton
States that light emitted by luminous object consist of
tiny particles of matter
called corpuscles

33. Nature Of LightNature Of Light
WAVE THEORY
Created in seventeen century
By sir Christian Hygiene
states that light is emitted in series of waves that
spreads
out from a light source in all direction

34. ELECTROMAGNETIC THEORY
Created in nineteen century
By James Maxwell
States that light posses both electric and magnetic
properties and can travels through a vacuum
Light wave is a part of EMR and make up EMS
Nature Of LightNature Of Light

35. Nature Of LightNature Of Light
QUANTUM THEORY
Created in nineteen century
By Max Planck
States that light waves travels as a separate
packets of energy called “quanta” or “photons”.
correct and accurate theory