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Question

Focal length of the eye lens is


A

fixed

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B

sometimes fixed and sometimes variable

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C

variable

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D

cannot say

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Solution

The correct option is C

variable


Correct answer explanation:

  1. The eye lens can focus the image of both far-off and near objects.
  2. It is done by changing the focal length of the eye lens.
  3. The ciliary muscle adjusts the position of the eye lens.
  4. By using the power of accommodation, the eye lens can focus both near and distant objects on the retina.
  5. So, the focal length of the human eye is variable.

Thus, option (c) is correct.


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