10.74 In a dielectric medium (s = 980, μ = μo), a plane wave with H = 0.2 cos(10't - kx - k√8z)a, A/m is incident on an air boundary at z = 0. Find (a) 6, and 0, (b) k (c) The wavelength in the dielectric and in air (d) The incident E (e) The transmitted and reflected E (f) The Brewster angle