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Question

How can you find critical angle of water? Explain your steps briefly.

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Solution

We know the refractive index of water, μ=43=1.33

And also the critical angle can be found by the formula,

C=sin1(1μ)C=sin1(11.33)C=sin1(0.7518)C=48.7

Hence the refractive index of water is 48.7

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