Question

Unpolarized light is incident on a plane glass surface having refractive index . The angle of incidence at which reflected and refracted rays would become perpendicular to each other is : (a) 15° (b) 30° (c) 45° (d) 60°

Answer 1

Answer:

The answer will be option d

Explanation:

According to the problem the glass surface has a refractive index, Let the index be x

As the value of it is not given am taking the value as √ 3

Now we know that

sin θ/sin∅ = x

we can rewrite it like

x = sinθ/sin(90-θ) = sinθ/cosθ = tanθ =√ 3  [ where theta is the incidence angle and ∅ be the refracting angle]

Therefore θ = 60°

Answer 2

Answer:

d) 60° will be exect answer