1. Chapter 4 Light and Our World
SOUND AND LIGHT
Chapter 4
Light and Our World

2. Section 3
Light and Sight

3. the very narrow range of wavelengths and frequencies in the electromagnetic spectrum that humans can see
visible light

4. seven colors of the visible light spectrum

5. three colors of light that can be combined in different ratios to produce all colors of light
red
green
blue
primary colors of light

6. a transparent membrane that protects the eye and refracts light
cornea

7. the opening to the inside of the eye
pupil

8. the colored part of the eye that controls the size of the opening to let in more or less light
iris

9. the part of the eye that refracts light to focus an image on the back surface of the eye
normal
cataract
lens

10. the back surface of the eye that acts like a screen for the image
retina

11. attached to rods and cones in the retina to carry information to the brain
optic
nerve

12. Parts of the Eye
MUSCLE
MUSCLE

14. when the eye is too long and the lens focuses light in front of the retina
nearsightedness

15. when the eye is too short and the lens focuses light behind the retina
farsightedness

16. A nearsighted person can clearly see ____ objects.

17. A _________ person can clearly see far objects.
farsighted

18. a lens that is thinner in the middle than at the edges and is used to correct nearsightedness

19. a lens that is thicker in the middle than at the edges and is used to correct farsightedness

20. a condition in which 5-8% of men and 0
a condition in which 5-8% of men and 0.5% of women in the world have trouble distinguishing
certain colors
color deficiency

21. Most people with color deficiency have trouble seeing ___ and _____.
red
green

22. Fun and Games
Visible Light
Color Test
On Line Color Vision Test
Color Correction
Your Eyes
How We See Things

23. More Fun and Games Anatomy of the Eye Vision 101 Optics for Kids
Bill Nye on The Eye
Vocabulary Games