Question

The angle of incidence of another red ray is 65º. The refractive index of the glass of block
ABCD for red light is 1.62.
(i) Calculate the angle of refraction in the glass for this ray.

Answer 1

Answer:

34º

Explanation:

The computation of the angle of refraction in the glass for this ray is shown below:

Given that

the angle of incidence of another red ray is 65º

And, n_1 = 1

n_2 = 1.62

According to shell law

n_1 sin $\theta$_1 = n_2 sin $\theta$_r

sin $\theta$_r = 1 sin 65÷ 1.62

= 0.559

$\theta$_r  = sin^-1 (0.559)

= 34º