Derive the Fresnel equations for the complex amplitude of the
reflected and transmitted electric fields ?or and ?ot, in terms of
the amplitude of the incident electric field ?oi, for a plane wave
incident at an oblique angle on an interface between two
dielectrics, when the polarization of the incident wave is
perpendicular to the plane of incidence (s-polarized). Express the
answer in terms of the parameters ?= costhetaT/costhetaI and
?=M1v1/M2v2. <-M mue