Question

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

Answer 1

Complete Question

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

(a) the index of refraction of the glass and

(b) the Brewster angle?

Answer:

a

`n_r = 1.376`

b

`i = 54^o`

Step-by-step explanation:

From the question we are told that

The angle of refraction is
`r = 36.0 ^o`

Generally according Brewster law

`i + r = 90`

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

So

`i + 36.0 = 90`

`i = 54^o`

Now the refractive index is mathematically represented as

`n_r = tan (i)`

substituting values

`n_r = tan (54)`

`n_r = 1.376`