## Refraction angles for interfaces with absorbing media interfaces

For light entering an interface from region 1 to region 2, where region 1 is a dielectric medium with refractive index $n_1$, and region 2 is an absorbing medium with complex refractive index $n_2 = n_2 + ik_2$. In a dielectric-dielectric case, the angle of refraction $\theta_2$ is given by\sin […]