1) Low-amplitude waves correspond with _______ colors, and high-amplitude waves correspond with __________ colors.
a. Dim, bright
b. Bright, dim
c. Natural, dim
d. Soft, natural
2) When Joe wakes up in the morning and opens his eyes to a bright sunlit room, a round muscle in each eye, the ____________ , adjusts the ___________ to regulate the amount of light entering his eye.
a. Iris, pupils
b.iris, corneas
c. Sclera, retinas
d. Pupil, lenses
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