Answer to Question #325801 in Physics for biday

Question

A ray of light is incident through glass, with refractive index 1.52, on an interference separating glass and water with refractive index 1.32. What is the angle of refraction if the angle of incidence of the ray in glass is 25°?

Answer 1

The Snell's law says

$$n_1\sin\theta_1=n_2\sin\theta_2$$

So, the angle of refraction

$$\theta_2=\sin^{-1}\frac{n_1\sin\theta_1}{n_2}$$

$$\theta_2=\sin^{-1}\frac{1.32\sin25^\circ}{1.52}=21.5^\circ$$