Roy Lewallen wrote:
I think the basic problem here is assigning energy to each traveling
wave. It's taking you into exactly the same morass that Cecil constantly
finds himself in. He also concluded some time back that two waves which
collide had to reverse direction in order to conserve power, energy,
momentum, or something. Energy in the system is conserved; but nowhere
is it written that each wave has to have individually conserved energy.

I wish you would stop using you guru status to misquote people.
During wave cancellation, the waves do *NOT* "collide". They
cannot collide since they are traveling in the same direction.
I just read on a plane trip today where Ramo & Whinnery talk
about wave cancellation. When waves are canceled, their energy
components have to go somewhere.

I disagree with Roy's last sentence. If an EM wave exists, it's
Poynting vector is ExM. The energy in that individual wave *must*
be conserved. If that energy is not conserved, the conservation
of energy principle is violated.
--
73, Cecil http://www.w5dxp.com