A plane wave with \eta=\sqrt{\frac{j w \mu}{\sigma}}=\sqrt{\frac{w \mu}{\sigma}} e^{j \pi / 4}=\sqrt{\frac{w \pi}{2 \sigma}}+j \sqrt{\frac{w \mu}{2 \sigma}} is incident normally on a thick plane conductor lying in the X-Y plane. Its conductivity is 6 \times 10^{6} S/m and surface impedance is 5 \times 10^{-4} \angle 45^{\circ} \Omega. Determine the propagation • constant and the skin depth in the conductor.