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A thin glass (refractive index 1.5) lens has optical power of -5 D in air. Its optical power in a liquid medium with refractive index 1.6 will be

Options

  1. A1 D
  2. B-1 D
  3. C25 D
  4. DNone of these

Correct answer

D. None of these

Step-by-step solution

P _ m P _ air = ( _ _ a -1 ) ( _ _ m -1 ) P _ m =5 / 8 D

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