In the previous lecture we summed up the properties of electromagnetic waves and its representation.

In this lecture we will be looking into the modification which an EM wave under goes when it strikes the interface of two dielectric medium .

Questions  addressed :  Electromagnetic waves at the interface of two dielectrics medium Reflection and the transmission coefficient as a function of angle of incidence Brewster's angle

When an electromagnetic wave strikes at and air dielectric interface, from air to the dielectric medium, part of it is reflected back and part of it is transmitted into the dielectric medium. The amount of light reflected and transmitted depends on the angle of incidence, refractive indices of the medium forming the interface and the angle of incidence.