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The critical angle iC is given is given ...

The critical angle `i_C` is given is given by [n is the refractiveindex of optically denser medium with respect to air]

A

`i_C = sin ^-1 (n)`

B

`i_C = sin ^-1 frac(1)(n))`

C

`i_C - frac(1)(2) sin ^-1 (n)`

D

`i_C = 2 sin^-1 (frac(1)(n))`

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