Question

A ray of light in air is incident on a flat piece of glass at an angle of θ = 54° with respect to the surface. The glass has index of refraction n= 1.8. What is the angle of the refracted ray?

Answer 1

Answer:

26.7°

Explanation:

Angle of incidence, i = 54°

refractive index of glass with respect to air, n = 1.8

Let r be the angle of refraction.

By use of Snell's law

$n=\frac{Sini}{Sinr}$

By substituting the values, we get

$1.8=\frac{Sin54}{Sinr}$

$1.8=\frac{0.809}{Sinr}$

$Sinr=\frac{0.809}{1.8}$

Sin r = 0.449

r = 26.7°

Thus, the angle of refraction in the glass is 26.7°