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

26.7°

Step-by-step 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=(Sini)/(Sinr)`

By substituting the values, we get

`1.8=(Sin54)/(Sinr)`

`1.8=(0.809)/(Sinr)`

`Sinr=(0.809)/(1.8)`

Sin r = 0.449

r = 26.7°

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