Question

Maurice directs a beam of light on a sheet of glass at an angle of 51°. What is the angle of refraction in the glass? The refractive index of glass is 1.46.

A: 22 degrees
B: 29 degrees
C: 32 degrees
D: 36 degrees

Answer 1

Maurice directs a beam of light on a sheet of glass at an angle of 51°. The refractive index of glass is 1.46. The angle of refraction in the glass is 29 degrees. The answer is letter B.

Answer 2

Angle of refraction in the glass is 32 degrees

Step-by-step explanation:

It is given that,

Maurice directs a beam of light on a sheet of glass at an angle, θ₁ = 51°

The refractive index of the glass is, n₂ = 1.46

We know that the refractive index of the air is, n₁ = 1

We have to find angle of refraction in glass i.e. θ₂

According to Snell's law :

`(n_1)/(n_2)=(sin\ \theta_2)/(sin\ \theta_1)`

Putting all the values we get :

`(1)/(1.46)=(sin\ \theta_2)/(sin51)`

`\theta_2=sin^(-1)((sin(51))/(1.46))`

`\theta_2=32\ ^0`

Hence, the correct option is (c) " 32 degrees ".