Prob.6. 1.2 A plane wave traveling along the x-axis in a polystyrene-filled region with 6 = 2.54 has an elec- tric field given by Ey = Eo cos(at - kx). The frequency is 2.4 GHz, and Eo = 5.0 V/m. Find the following: (a) the amplitude and direction of the magnetic field, (b) the phase velocity, (c) the wave- length, and (d) the phase shift between the positions x1 = 0.1 m and x2 = 0.15 m. Prob.7. 1.5 A plane wave is normally incident on a dielectric slab of permittivity er and thickness d, where d = 20/(4) and 20 is the free-space wavelength of the incident wave, as shown in the accompanying figure. If free-space exists on both sides of the slab, find the reflection coefficient of the wave reflected from the front of the slab. 咖 سي 0