Physics
Grade-10
Easy

Question

Mona wears a pair of eye lenses of focal length 1.6 m. What is the power of the lenses?

  1. + 0.353 D
  2. + 0.625 D
  3. - 0.353 D
  4. - 0.625 D

hintHint:

The power of lens is it's ability to bend light. This means it depends on the focal length.

The correct answer is: + 0.625 D


    The correct option is b)+ 0.625 D.
    • The power can be calculated by reciprocal of the focal length in meters.
      f= 1.6m
      Power = 1/f
      power=1/1.6
      power= +0.625 D

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