A uniform plane wave propagates in the + z-(downward) direction into the ocean (ϵr = 72, μr = 1, σ = 4S/m). The magnetic field at the ocean surface (z = 0) is H(0, t) = ay 0.3 cos 108t (A/m).
a) Determine the skin depth and the intrinsic impedance of the ocean water.
b) Find the expressions of E(z, t) and H(z, t) in the ocean.
c) Find the average power loss per unit area in the ocean as a function of z.
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