The trichromatic theory states that ____
a. ?three different types of cones detect the three different primary colors of light
b. ?humans really only perceive three different colors
c. ?cells in the retina can send information to the brain about two colors, but only one at a time
d. ?the three major types of cells in our visual system are: red/green, blue/yellow, and black/white cells
ANSWER:
a
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a. true b. false