An infinite lossless ferrite medium with a saturation magnetization of 4π Ms = 1200 G and a dielectric constant of 10 is biased to a field strength of 500 Oe. At 8 GHz, calculate the differential phase shift per meter between an RHCP and an LHCP plane wave propagating in the direction of bias. If a linearly polarized wave is propagating in this material, what is the distance it must travel in order that its polarization is rotated 90??