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

Section 3 Light and Sight

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

seven colors of the visible light spectrum

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

a transparent membrane that protects the eye and refracts light cornea

the opening to the inside of the eye pupil

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

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

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

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

Parts of the Eye MUSCLE MUSCLE

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

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

A nearsighted person can clearly see ____ objects.

A _________ person can clearly see far objects. farsighted

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

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

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

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

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

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