Question

e.m.waves are incident normally on an
interface separating two media of refractive
indices n1 and n2. Obtain expressions for
reflection and transmission coefficients.

Answer 1

Coefficient of reflection when light incident normally on an interface

$$\rho=(\frac{n_1-n_2}{n_1+n_2})^2$$

Coefficient of transmission

$$T=1-\rho$$