Arnold enters a darkened movie theater on a sunny summer afternoon. It takes many minutes for his eyes to adapt to the darkness because
A. it takes some time for the retina to rebuild its rhodopsin stores from opsin and retinene.
B. the rods in the eye work only in bright light, and it takes time for the cones to work in weak light.
C. the iris takes time to close after being subjected to bright light.
D. the optic nerve fatigues in bright light, and it takes time to recover.
E. the pupil is too small to admit sufficient light.
Answer: A. it takes some time for the retina to rebuild its rhodopsin stores from opsin and retinene.
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