Jim Kelley wrote:

Cecil Moore wrote:
What happens to reverse the direction and momentum of
the internal reflection in the thin film?

That's what I was asking you. You seem to be hinting at something, but
not actually saying it. What, other than reflection, are you suggesting
causes electromagnetic waves to reverse their direction of propagation
in the system you describe?

I have published my take on that reflection. It is a two
step process involving:

1. A normal reflection from a physical impedance discontinuity
that doesn't account for all the reflected energy since the
physical reflection coefficient is not 1.0.

2. Wave cancellation between two reflected wave components
in the direction of the source results in a redistribution
of that energy in the direction of the load. This accounts
for the rest of the reflected wave energy.

You have objected to step 2 as invalid so the onus is upon
you to provide an alternate explanation. Please post the
governing equations. So far you have refused to do anything
except harp, nit-pick, and kibitz while wildly engaging in
hand-waving. Time to put up or shut up. Please explain the
process of 100% re-reflection of the internal reflected wave.
--
73, Cecil http://www.w5dxp.com