The document explores the concept of light, its importance for visibility, and the functioning of the human eye, including how the pupil adjusts to varying light conditions. It discusses different sources of light, such as the sun and light bulbs, and poses questions to engage readers in understanding light and vision. By the end, readers will understand how light is essential for seeing objects and how the eye adjusts to different lighting environments.

1. What could you see?
Have you ever been in a
pitch-black room?

2. Did you notice the details on
the globe?
Can you spot the football?

3. How Can
We See?
Explore what is light and how it
allows humans to see

4. Today's
Question
Bank
What is light?
What are things that emit light?
How do we see in dim light?
How does the pupil change size?

5. explore the characteristics of
color lights
cite importance of light
describe light
At the end of the lesson,
you'll be able to:
You'd need
3,800,000,000,000,000,000,
000,000,000
candles to have the same
brightness as the Sun!
That's 3.8 Octillion candles!
DID YOU
KNOW?

6. What is
Light?
Light is a form of
energy.
It allows you to see
objects.
It travels in a straight
line and enters your eye
through the pupil.
Without light, your eye detects nothing.

7. What are
the things that
emit light?

8. How do we
see in dim
light?
A dimly lit room still has
a little bit of light.
Your pupil widens to
allow as much light as
possible into your eye.
This allows you to see something
even in dim light.

9. Things that emit light
What else can you think of?

10. Turn off the lights in an
enclosed room.
Try This!
How long did it take for your eyes
to adjust to the darkness?
Quickly flick on the lights.
How did your eyes react to the
sudden brightness?

11. How does
the pupil
change size?
The iris controls the
size of your pupil!
It increases or decreases
the size of the pupil to
control the amount of
light entering it.
Iris is the colored part of the eye.

12. Summing Up
Some things that
emit light are...
fire, the Sun, light bulbs,
stars, fireflies,
flashlights, and
televisions.
Light...
allows you to see things.
It travels in a straight
line.
In dimly lit
conditions...
the pupil opens up more
to allow more light to
come in.

13. ?
Can you name
other parts of the
human eye?
Name one additional part of the human eye
apart from the pupil and iris.
Get ready to share one unique fact about it
with the whole class.