Cecil Moore wrote:

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.

I have also explained the cause of reflection to you many times. (Hint:
it's the change in media thing. See below for one example.)

What causes 100% re-reflection of reflected waves
in a matched system? You are still avoiding a valid answer.

I wrote you an email with a reference that I recomended you read.
It's the best explanation I've seen. I'll bet you haven't read it. I
don't know why you keep saying I avoid these things when my efforts to
explain it to you is my entire purpose for corresponding on the subject.

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?

The thing that causes reflection is a change in media. Impedance, index
of refraction - something like that. See below.

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.

Then it must be that your question, which I answered, had 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 statement is less contrary than your disposition.

Waves don't cause other waves to change direction.


Normally, that's true.

As if you would know. It's of course always true.

ac6xg