Question

Light strikes a 5.0-cm thick sheet of glass at an angle of incidence in air of 50°. The sheet has parallel faces and the glass has an index of refraction 1.50. What is the angle of refraction in the glass?

Answer 1

Answer:

30.81°

Explanation:

θ₁ = angle of incidence = 50°

θ₂ = Angle of refraction

n₂ = Refractive index of glass = 1.5

n₁ = Refractive index of air = 1.0003

From Snell's Law

Using Snell's law as:

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

$1.0003\times {sin50}={1.50}\times{sin\theta_2}$

Angle of refraction= sin⁻¹ 0.5122 = 30.81°.