Roy Lewallen wrote:
Yes, this misconception will never die. Is it really worth the trouble
continually trying to contradict it?

Not if all you do is trade one old-wives tale
for another. One cannot understand these concepts
without understanding the conditions that cause
EM waves to interact.

The conditions that cause interaction between EM
waves are coherency and collinearity (in the same
direction in a transmission line).

The interaction of reflected EM waves can result
in zero or maximum reflected power being dissipated
in the transmitter - and anything in between.

The interaction of reflected EM waves at a thin-
film coating on glass can result in zero or
maximum reflected energy and anything in between
depending upon the thickness of the thin-film.
--
73, Cecil http://www.w5dxp.com