Cecil Moore wrote:

Jim Kelley wrote:

What has been known since long before you were born is that only
direct interaction with matter causes EM waves to reflect.


Would you say the changing characteristic impedance between
two waveguides in outer space is a direct interaction
with matter? There is no matter inside the waveguide with
which to interact.

Come on, Cecil. You propose a scenario with a change in
characteristic impedance, and then try to pretend there isn't any
matter involved?

I'll have to take a look at the math.

411 - People usually do that _before_ they announce their discovery of
a new natural phenomenon.

But no matter what it is called, the results are the same.
"A rose by any other name ..."

Yes. An enormous blunder is, by any other name..... :-)

73, Jim ac6xg

Jim Kelley wrote:
Come on, Cecil. You propose a scenario with a change in characteristic
impedance, and then try to pretend there isn't any matter involved?

If you are admitting that a change in Z0 at an impedance
discontinuity involves matter, then we are in agreement.
Sounded to me like you were saying there's no matter
involved at a transmission line impedance discontinuity.

My energy article covers this subject. I state in that article
that there are no reflections except at *physical* impedance
discontinuities so you already know what I said previously.
--
73, Cecil http://www.w5dxp.com