Question

a. 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

Answer:

this will happen only when angle of incidence lies perpendicular on glass slab and there will ne no deviation in its path.

and here angle of incidence w.r.t. Normal will be zero .Also angle of emergence w.r.t will also be zero. i.e;

<i=<e=0°

Answer 2

Explanation:

according to the second law of reflection. angle of incidence=angle of reflection.  

thus, the angle of emergence of a light ray falling on glass slab is the angle of reflection

..

i=e