A beam of light is partially reflected and partially refracted from a surface The angle between reflected and refracted - Physics - Ray Optics And Optical Instruments

Question

A beam of light is partially reflected and partially refracted from
a surface The angle between reflected and refracted light ray is
90degree If the angle of refraction is 30degree,the angle of
incidence is

Reetika · Accepted Answer

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A beam of light is partially reflected and partially refracted from a surface. The angle between reflected and refracted light ray is 90degree. If the angle of refraction is 30degree,the angle of incidence is