You have an incident ray from a medium with a n1=1, through a medium with a n2 =3.325. if the incident angle is equal to 0.478 rad, what is the refraction angle? (answer is in radians)

0.139 rad

Explanation:

We use Snell's law , where if is the refractive index of the medium containing the incident ray, would be the incident angle, and if is the refractive index of the medium containing the refracted ray, would be the refraction angle, which we want, so we do:

And finally:

We then insert our values:

conservation of mass

mass before something happens = mass afterwards