Two current sheets are fixed in free space in the x = 0 plane and the x = lambda/4 plane with surface current densities given by j_s (t) = j_1 cos(omega t + phi) z cap a/m and j_8(t) = j_2 cos(omega t)y cap a/m, respectively, where j_1, j_2, and phi are real numbers. tem waves will propagate away from each sheet and superpose with each other to create a wavefield whose polarization depends on the phase phi of the surface current at x = 0 and on the ratio j_2/j_1. assuming that j_2/j_1 = 1, determine the value(s) for phi required for the superposed tem waves propagating in the region x > lambda/4 to have the following polarizations. justify your choice of phi case by determining the electric field phasor produced in the region x > lambda/4 with your choice of phi. a) right handed circular polarization b) left handed circular polarization c) linear polarization