(Solved): In writing Eqs. 9.76 and 9.77, I tacitly assumed that the reflected and transmitted waves have the s ...

In writing Eqs. 9.76 and 9.77, I tacitly assumed that the reflected and transmitted waves have the same polarization as the incident wave-along the x direction. Prove that this must be so. [Hint: Let the polarization vectors of the transmitted and reflected waves be and prove from the boundary conditions that f)r = ()R = 0.]