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