When the light beam passes from one medium to the second, the angle of incidence is 60, and the angle of refraction is 30.

When the light beam passes from one medium to the second, the angle of incidence is 60, and the angle of refraction is 30. What is the relative refractive index of the second medium relative to the first.

The ray refraction law is described by the formula:

n 1,2 = sin α / sin β, where

n 1,2 is the relative refractive index of the beam (dimensionless value);

sin α – angle of incidence, °;

sin β – angle of refraction, °.

We decide:

n 1.2 = sin (60 °) / sin (30 °) ~ 1.732.

Answer: the relative refractive index of the second medium relative to the first is ~ 1.732.