# What happens to the angle of refraction as the angle of incidence increases?

Snell's Law determines the angle of refraction based on the the angle of incidence, and the index of refraction of both mediums. The angle of incidence and angle of refraction share a liner relationship described by $\sin \left({\theta}_{1}\right) \cdot {n}_{1} = \sin \left({\theta}_{2}\right) \cdot {n}_{2}$ where ${\theta}_{1}$ is the angle of incidence, ${n}_{1}$ is the index of refraction for the original medium, ${\theta}_{2}$ is the angle of refraction, and ${n}_{2}$ is the index of refraction.