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Unpolarised light is incident from air o...

Unpolarised light is incident from air on a plane surface of a material of refractive index `mu`. At a particular angle of incidence `i`, it is found that the reflected and refracted rays are perpendicular ot each other, Which of the following options is correct for this situation?

A

`i = sin^(-1)((1)/(mu))`

B

Reflected light is polarised with its electric vector perpendicular to the plane of incidence

C

Reflected light is polarised with its electric vector parallel to the plane of incidence

D

`i = tan^(-1)((1)/(mu))`

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