# Unpolarized light is incident on a plane glass surface having refractive index . The angle of incidence at which reflected and refracted rays would be

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Unpolarized light is incident on a plane glass surface having refractive index . The angle of incidence at which reflected and refracted rays would become perpendicular to each other is :
A. 15^(@)
B. 30^(@)
C. 45^(@)
D. 60^(@)

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