"When red light in vacuum is incident at the Brewster angle on a certain glass slab, the angle of refraction is"

Complete Question

When red light in vacuum is incident at the Brewster angle on a certain glass slab,  the angle of refraction is . What are

(a) the index of refraction of the glass and

(b) the Brewster angle?

a

b

Explanation:

From the question we are told that

     The angle of refraction is  

Generally according Brewster law

Here is the angle of incidence which is also the Brewster angle

So

Now the refractive index is mathematically represented as

substituting values