Jim Kelley wrote:
The only thing which can cause energy to change direction is reflection.
I have answered that question every time you asked it.

But that is a non-answer and you don't offer any idea as to the cause
of the reflection. What causes 100% re-reflection of reflected waves
in a matched system? You are still avoiding a valid answer.

It means that for
an electromagnetic wave to reverse direction, it must encounter a change
in the nature of the conducting medium.

Assume it encounters a power reflection coefficient of 0.5 in a
matched system. What causes the reflection of the other half of
the reflected energy?

Impedance discontinuities or changes in the index of
refraction - those things cause reflection.

Yes, and wave cancellation in a transmission line only happens at
an impedance discontinuity so your assertion has no point.

An interference pattern
created by waves is still just waves arranged differently.

On the contrary, wave cancellation at a match point is permanent.
The waves cease to existence in the direction of the source. They
are not arranged differently. Your assertion is obviously false
for interference patterns at match points in transmission lines.
Before you go into a tirade, what you say is usually true, just
not for match points in transmission lines which is a special case.

Waves don't cause other waves to change direction.

Normally, that's true. But when the two coherent waves disappear
from existence in the direction of the source, the conservation
of energy principle takes over. If the energy is not flowing
toward the source then it must necessarily flow toward the load.
That is such a simple concept it's hard to believe that you
cannot comprehend it. It's explained in the web page quote below.

If you think they do, then you need to try to find some proof.

Isn't the following proof enough? They are talking about wave
cancellation such as happens at a non-reflective surface or a
match point in a transmission line.

"... when two waves of equal amplitude and wavelength that are 180-
degrees out of phase with each other meet, they are not actually
annihilated. All of the photon energy present in these waves must
somehow be recovered or redistributed in a new direction, according to
the law of energy conservation ..."

"Redistributed in a new direction" in a transmission line means
changing direction. What is it about that simple concept that
you fail to comprehend?
--
73, Cecil http://www.qsl.net/w5dxp


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