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Question

Relaxation of the ciliary muscles causes the focal length of the eye lens to ________



A

remain constant

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B

increase

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C

decrease

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D

None of the above

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Solution

The correct option is B

increase


When ciliary muscles are relaxed, then the focal length of eye lens increases.
When the muscles are relaxed, the lens becomes thin. Thus, it's focal length increases.
This enables us to see distant objects clearly.


Physics

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