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Question

When the ciliary muscles are relaxed, then the focal length of the eye lens ___.


  1. remains constant

  2. increases

  3. decreases

  4. first increases then decreases


Solution

The correct option is B

increases


When ciliary muscles are relaxed, then the lens becomes thin i.e. the focal length of eye lens increases. The lens has the capacity to increase its focal length in order to view distant objects.

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