Single Answer MCQ
Q-00001696
How does the pupil regulate the amount of light entering the eye?
1
By converting light into electrical signals
2
By adjusting the curvature of the lens
3
By controlling the size of the cornea
4
By changing its size in response to light intensity
Answer and Solution
Answer
D. By changing its size in response to light intensity
Solution:
The pupil in the human eye regulates the amount of light entering the eye by changing its size in response to the intensity of light. In bright conditions, the pupil constricts to reduce the amount of light, while in dim conditions, it dilates to allow more light to enter. Therefore, the correct answer is 'By changing its size in response to light intensity'.
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