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7. The critical angle for two …

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7. The critical angle for two media of refractive indices of medium 1 and 2 given by 2 and 1 respectively is

Posted by Nadim Sarbar 5 years ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years ago

The sine of the critical angle is the ratio of refractive index of medium 2 to that in medium 1. Thus sin θc = n₂/n₁.

To get θc, put n₁ = 2 and n₂ = 1. Thus we get θc = sin^-1(n₂/n₁) = sin^-1(1/2) = 30 degree.

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