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AP EAMCET202022 Sep 2020Morning ShiftPhysicsRay OpticsActual

A travelling micros dot marked on a pi slab ( =1.5) of thic the ink dot. The tra be moved in focus.

Options

  1. A0.04 ~m , downwards
  2. B0.04 ~m , upwards
  3. C0.06 ~m , downwards
  4. D0.06 ~m , upwards

Correct answer

B. 0.04 ~m , upwards

Step-by-step solution

We know that, Refractive index, = Real depth Apparent depth Here, =1.5 and real depth = thickness of glass slab =0.12 ~m = 012 Apparent depth Apparent depth = 0.12 1.5 =0.08 ~m Hence, image appears to be raised by 0.08 2 ~m =0.04 ~m Hence, travelling microscope must be moved upward by 0.04 ~m .

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