When a plane wave falls upon the plane interface between two media the incident and reflected wave-vectors define the plane of incidence. The direction of the electric field vector in the incident wav...When a plane wave falls upon the plane interface between two media the incident and reflected wave-vectors define the plane of incidence. The direction of the electric field vector in the incident wave may make an arbitrary angle with the plane of incidence. The general case may be treated as the sum of two special cases: an electric vector perpendicular to the plane of incidence (s-polarized light) and an electric vector which lies in the plane of incidence (p-polarized light).
