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Question

Refractive index of glass with respect to water is 98 and refractive index of glass with respect to air is 32. The refractive index of water with respect to air will be

A
53
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B
35
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C
43
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D
34
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Solution

The correct option is C 43
Given:
Refractive index of glass with respect to water, μgw=98
Refractive index of glass with respect to air, μga=32
Refractive index of water with respect to air, μwa= ?


We know that,

μga ×μwg× μaw=1

μga × 1μgw × μaw=1

32×19/8 × μaw=1

μaw=34

μwa= 1μaw=43

Hence, option (c) is the correct answer.


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