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

Answer:

Angle of refraction in the glass is 32 degrees

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 :

$\dfrac{n_1}{n_2}=\dfrac{sin\ \theta_2}{sin\ \theta_1}$

Putting all the values we get :

$\dfrac{1}{1.46}=\dfrac{sin\ \theta_2}{sin51}$  

$\theta_2=sin^{-1}(\dfrac{sin(51)}{1.46})$

$\theta_2=32\ ^0$

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

Answer 2

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.