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For a critical angle of 60 degree and the refractive index of the first medium is 1.732, the refractive index of the second medium is

For a critical angle of 60 degree and the refractive index of the first medium is 1.732, the refractive index of the second medium is Correct Answer 1.5

From the definition of Snell law, sin θc = n2/n1. To get n2, put n1 = 1.732 and θc = 60. Thus we get sin 60 = n2/1.732 and n2 = 1.5.

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