Prove that the angle of emergence and angle of incidence are equal in case of refraction through a glass slab

With a neat labeeled diagram, prove that if the angle of incidence and angle of emergence of a light ray falling on a glass slab are I and e respectively, then i=e.

A student performs the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He measures the angle of incidence anglei , angle of refraction angler and angle of emergence angle e for all his observations. He would find that in all cases :

A ray of light passes through the equilateral prism such that angle of incidence is equal to the angle of emergence if the angle of incidence is 45^(@) . The angle of deviation will be

In an experiment to study the refraction of light through a rectangular glass slab, a student measured the angle of incidence, angle of refraction and the angle of emergence, The student lost the reading of angle of incidence but noted the readings of angle of refraction to be 35^(@) and angle of emergence to be 65^(@) . The angle of incidence is likely to be :

One student is doing experiment to draw the path of light rays passing through a glass. For this, he measured the angle of refraction and angle of emergence for every angle of incidence. In all the cases he found that

Prove that i = e, If the angle of incidence and angle of emergence subtended by a light ray falling on a surface of glass slab are i and e respectively. How much angular deviation is suffered by the incident ray.

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 3//4 of the angle of the prism. The angle of deviation is