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Question

Refractive index of water with respect to air is 4/3 and glass is 3/2.Find refractive index of glass with respect to water.


Solution

nga = a / g  nwa= a / w

3 / 2 = a / g  4 / 3 = a / w

g = 2 / 3 a  w = 3 / 4 a

NOW ,  ngw  = 3/4 a  divided by    2/3 a 

  ngw   =  9 / 8

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