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MHT CET2011PhysicsRay Optics

A glass slab of thickness 4 ~cm contains the same numbers of waves as 5 ~cm of water when both are traversed by the same monochromatic ray of light. The refractive index of water is 4 / 3 , what is that for glass?

Options

  1. A5 / 3
  2. B5 / 4
  3. C16 / 15
  4. D3 / 2

Correct answer

A. 5 / 3

Step-by-step solution

a n_ g = _ a n_ w _ a n_ g array l a n_ g = 4 3 _ w _ g a^ n_ g = 4 3 5 4 a^ n_ g = 5 3 array

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