A perpendicularly polarized electromagnetic wave impinges from medium 1 (mu_1 = mu_0, epsilon_1 = 4 epsilon_0) to medium 2 (mu_2 = mu_0, epsilon_2 = epsilon_0). (a) What is the critical angle? (b) If the incident angle theta is 45 degree, find k_x and k_z in terms of k_0 = w squareroot mu_0 epsilon_0. (c) Find k_tz in terms of k_0. (d) In the second medium, find the distance z_0 at which the field strength is 1/e of that at z = 0^+, (e) Find l R_II and the phase shift arg(R_t).