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In relation n1sin i=n2 sin r, n1 and n2 ...

In relation `n_1sin i=n_2 sin` r, `n_1` and `n_2` are

A

(A) relative refractive indices of two media.

B

(B) absolute refractive indices of two media.

C

(C) refractive index of vacuum and medium respectively.

D

(D) refractive index of medium and vacuum respectively.

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