# Refractive Index and Reflection

Does the magnitude of the refractive index affect reflection? Will a ray be more reflected the higher the refractive index of the other medium is?

$$R = \left|\frac{n_1-n_2}{n_1+n_2}\right|^2$$
You can see that when $n_1=n_2$, there is no reflection; and that the intensity of reflection is the same whether you go from $n_1$ to $n_2$ or the other way around. Finally, when $n_1\gg n_2$, the reflectance gets very close to 1.