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A light incident from air to medium of r...

A light incident from air to medium of refractive index ` sqrt(2n)`. Angle of incidence is twice of angle of refraction then the angle of incidence is

A

`sin^(-1)(sqrtn)`

B

`cos6(-1)(sqrt(n/2))`

C

`sin^(-1)(2sqrtn)`

D

`2cos^(-1)(sqrt(n/2))`

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