Q8 of 37 Page 1

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:

According to Snell’s law




Where i is the angle of incidence and r is the angle of refraction.


Given that refractive index is .


Refractive index



Therefore, i = 60˚.

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