Keith Dysart wrote:
Just as one does not expect the
partial values of volts and currents during superposition
to produce a power value that represents a real energy
flow, one should not expect it from Es and Hs which are
the partial values being superposed.

Given two coherent EM waves, W1 and W2, we know
that the power in W1 is E1xH1 and the power
in W2 is E2xH2. That is simple physics.

No matter what the results of superposition
of those two waves, the total energy in both
waves must be conserved. That is simple physics.

If you would think about what happens to two
coherent light waves in free space, you wouldn't
be able to justify your assertion above.
--
73, Cecil http://www.w5dxp.com