File talk:Electromagneticwave3D.gif
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Very pretty, but wrong: The E field should be shifted by 90 degrees in time relative to B, i.e. E = E_o cos(omega t) and B = B_o sin(omega t), so that W = 1/2 integral eps_0 E^2 + 1/mu_0 B^2 dV is constant.
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