Question

prove the following statement. if the angle of incidence and emergene of light ray falling on glass slab are i and e. prove i=e

Answer 1

it is the rule of reflection that

incident ray is always equal to the reflected ray

Answer 2

you need to prove that
angle of incidence = angle of refraction

if you take tge rule of parllel lines you can easily prove it..

hope i gave you an idea...