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A concave mirror of focal length f in air is dipped in a liquid of refractive index . Its focal length in the liquid will be:

Options

  1. Af
  2. Bf
  3. Cf ( -1)
  4. Df

Correct answer

B. f

Step-by-step solution

Focal length of mirror will not change because focal length of mirror doesn't depend on medium.

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