A uniform plane electromagnetic wave propagates in the +z- (downward) direction and impinges normally at z = 0 on an ocean surface. Let the magnetic field at z = 0 be H(0, t) = ayH0 cos 104t (A/m).
a) Determine the skin depth. (For the ocean: Conductivity = σ, permeability = μ0.)
b) Find the expressions for H(z, t) and E(z, t).
c) Find the power loss per unit area (in terms of H0) into the ocean.
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