Physics
Grade-10
Easy
Question
The size of the pupil increases when ____.
- There is enough light
- It is dark
- There is excess light
- None of the above
Hint:
The pupil is the portal that allows and regulates the flow of light to the retina.
The correct answer is: It is dark
The amount of light entering the eye is controlled by the iris muscle, which constricts or dilates the pupil. The pupil enlarges in low light to let in lighter and narrows in bright light to limit the amount of light that enters.
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