10.75 A parallel-polarized wave in air with E = (8a, 6a) sin(wt - 4y - 3z) V/m impinges a dielectric half-space as shown in Figure 10.27. Find (a) the incidence angle 0,, (b) the time-average power in air (p = μo, ε = E fields. =μo, & = ε), (c) the reflected and transmitted CHAPTER 10 ELECTROMAGNETIC WAVE PROPAGATION FIGURE 10.27 For Problem 10.75 Air (ε=ε0,= 0) ki Ei Dielectric (ε = 4ε0, p = μo) y