Page 60 - Science Course 3 (Book 2)

Mo10-L2b: How Does Light Interacts with Matter?

1. The cornea protects the eye. Light refracts SUMMARY
when it enters the cornea. The cornea helps
focus, or guide, light onto the retina. How Does Light Interacts with Matter?
Materials transmit, absorb, and ref ect
2. The iris is the colored part of the eye. The pupil different amounts of light.
is a hole in the iris. It gets wider in low light to
let more light.

3. The lens also helps focus light onto the retina.

4. The ciliary muscles change the shape of the
lens to help it focus light from near and far
objects.

5. Cells in the retina send signals to the brain
based on the light that strikes them. Rod cells
respond to dim light. Cone cells respond to
colored light

6. The optic nerve carries signal to the brain about Interaction with matter produces interesting
the images you see. effects in sunlight. You can see the Sun even
after it sets below the horizon.

Key Concept
How Does Light Interacts with Matter?

How do your eyes change light waves into the
images you see?

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