When we enter a darkened theatre,it takes a while before we can see our surroundings clearly.The most likely explanation for this phenomenon is that
A)the lens needs time to accommodate to the change in lighting.
B)the glutamate in rods has been depleted and more must be synthesized.
C)the visual system switches slowly between processing inputs from cones to inputs from rods.
D)it takes about 30 minutes for rhodopsin to regenerate after it has broken apart in response to light.

Question

When we enter a darkened theatre,it takes a while before we can see our surroundings clearly.The most likely explanation for this phenomenon is that​ 
A)the lens needs time to accommodate to the change in lighting. 
B)the glutamate in rods has been depleted and more must be synthesized. 
C)the visual system switches slowly between processing inputs from cones to inputs from rods. 
D)it takes about 30 minutes for rhodopsin to regenerate after it has broken apart in response to light.

Quizplus · Accepted Answer

The phenomenon described in the question is known as dark adaptation, which refers to the process by which the eyes adjust to low levels of light. Dark adaptation takes about 30 minutes to occur fully because it takes that long for the photopigment rhodopsin, which is responsible for night vision, to regenerate after it has been bleached by exposure to light. Thus, choice D is the best option. Choices A, B, and C are incorrect because they do not explain the time course of dark adaptation.

When We Enter a Darkened Theatre,it Takes a While Before