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MHT CET202120 Sep 2021Morning ShiftPhysicsRay OpticsActual

Inside a vessel filled with liquid a converging lens is placed as shown in figure. The lens has focal length 15 ~cm when in air and has refractive index 3 2 . If the liquid has refractive index 9 5 , the focal length of lens in liquid is

Options

  1. A15 ~cm
  2. B-60 ~cm
  3. C90 ~cm
  4. D-45 ~cm

Correct answer

D. -45 ~cm

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