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If the focal length of the biconvex lens is 25 cm , then the power of the lens will be

Options

  1. A+4 dioptre
  2. B-4 dioptre
  3. C+0.04 dioptre
  4. D-0.04 dioptre

Correct answer

A. +4 dioptre

Step-by-step solution

The correct answer is option A.

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