Question

1. If the angle of incidence and angle of emergence of a light ray falling on a glass slab are i and e respectively, prove that i = e

Answer 1

As the sides of slab are parallel
also normals drawn at two locations will b equal.
so r= r
now
RI of glass wrt air=1/RI of air wrt glass
so
sin i/sinr=1/sinr/sine
sini= sine
i=e

Answer 2

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