5. Characteristics of Light Energy
Travels in straight lines
• Can be reflected, refracted,
or absorbed
• Can be produced by natural
sources like the sun or
artificial sources like light
bulbs
9. How light moves
•Light travels in straight lines called rays.
•When an object blocks the path of light,
it creates a shadow.
•Light can also bend when passing
through different materials, which is
called refraction.
11. Reflection of Light
Reflection occurs when light
bounces off a surface.
•Example: A mirror reflects
light, allowing us to see our
reflection.
•Experiment: Use a mirror to
demonstrate reflection.
12. Refraction of Light
Refraction is the bending of light as
it passes from one material into
another.
• Example: When light passes
through water, it appears to bend.
• Experiment: Place a pencil in a
glass of water and observe how it
appears bent.
13. Absorption of Light
Definition: Absorption happens when
light is taken in by an object instead of
being reflected or transmitted through
it.
• Example: Dark-colored objects
absorb more light than light-colored
objects.
• Experiment: Compare how different
colored papers absorb light.
14. Uses of Light Energy
Seeing: Light helps us see objects and
navigate our surroundings.
Energy: Light can be converted into electricity
through solar panels.
Communication: Light is used in technologies
like lasers for communication and data
transmission.
15. Conclusion
Recap: Light energy is a form of energy
that travels in waves and is visible to the
human eye.
Importance: It helps us see, provides
energy, and enables communication.
18. Question 1: What is light energy?
a) Energy that comes from the sun only
b) Energy that helps us see things and travels in waves
c) Energy that is only produced by artificial sources
Question 2: Which of the following is NOT a
characteristic of light energy?
a) Travels in straight lines
b) Can be absorbed, reflected, or refracted
c) Can only be produced by natural sources
Question 3: What is refraction?
a) When light bounces off a surface
b) When light is absorbed by an object
c) When light bends as it passes through different
materials
Question 4: Which object reflects light so we can see
our reflection?
a) A mirror
b) A piece of paper
c) A glass of water
19. Question 5: What is the importance of light energy?
a) It helps us see, provides energy, and enables
communication
b) It only helps us see objects
c) It is not important in our daily lives
Question 6: What happens when an object blocks the
path of light?
a) It creates a rainbow
b) It produces heat
c) It creates a shadow
Question 7: How does light travel?
a) In zigzag lines
b) In curved lines
c) In straight lines
Question 8: Which color objects absorb more light?
a) Dark-colored objects
b) Light-colored objects
c) Both absorb the same amount
20. Question 9: What is reflection?
a) The bending of light as it passes from one material
into another
b) When light is absorbed by an object
c) When light bounces off a surface
Question 10: How can light energy be converted into
electricity?
a) Through solar panels
b) Through batteries
c) Through wind turbines
21. Answers:
1.b) Energy that helps us see things and
travels in waves
2.c) Can only be produced by natural
sources
3.c) When light bends as it passes through
different materials
4.a) A mirror
5.a) It helps us see, provides energy, and
enables communication
6.c) It creates a shadow
7.c) In straight lines
8.a) Dark-colored objects
9.c) When light bounces off a surface
10.a) Through solar panels
