Question

A rectangular glass slab having refractive index 3
is silvered at one surface as shown in figure. Light
ray will deviate by angle
when it cross the
glass slab.
Silvered​

Answer 1

Answer:

The answer is 120°

Explanation:

Given that:

θ=30°

If wall is absent then the light will follow a-b-c path but due to the presence of wall it deviates from original path and known as deviation of ray.

Suppose "δ" is the deviation angle.

We know that

θ + δ = 180°

θ=30°

δ =  180° - 30°

δ =120°