The document discusses how the structure of organisms depends on their function, and how vision requires reflection, refraction, and light traveling in straight lines. It specifically mentions that lenses focus or spread out light waves, and that rod cells detect light levels while cone cells detect color.

1. The Eye & Ear
Ch. 2
The structure of organisms (what they
look like) depends on their function
(what they do)

2. The Eye & Ear
Ch. 2
The structure of organisms (what they
look like) depends on their function
(what they do)

3. Ch. 2
The Eye & Ear
The structure of organisms (what they
look like) depends on their function
(what they do)

4. Ch. 2
The Eye & Ear
The structure of organisms (what they
look like) depends on their function
(what they do)

5. Life is Based on Physics
Visible
Light
is
A
Small
Part

6. Seeing Requires Reflection

7. To see a whole object...

8. Refraction

9. Transmission

10. Absorbtion

11. Angle of Reflection equals Angle of Incidence...

12. To see something our eye has to receive
a Reflection of Light Waves from it.

13. Light Travels in Straight Lines if
What it Travels Through Doesn’t Change

14. Remember Refraction...

15. Remember Refraction...

16. Lenses
Lenses focus or spread out light waves
Lenses are found in living creatures and non-
living objects.

17. Rod & Cone Cells
Rod cells detect the amount of light.
Cone cells detect what color the light is.