Richard Harrison wrote:
Cecil, W5DXP wrote:
"What phenomenon of physics causes the energy and momentum in that wave
to reverse direction?"

Suppose you have a 50-ohm coax that has a 25-ohm resistor across its
load end. The incident wave traveling on the coax has too much voltage
and too little current to supply the 25-ohm load.

What I was talking about is a little more complicated than
that. Assume rho^2 = 0.5 at an impedance discontinuity at
a match point. The rearward-traveling reflected wave sees
the impedance discontinuity at the match point and 1/2 of
the energy is reflected back toward the load according to
the rules of reflection. What reflects the other half of
the energy?

The 50 ohm coax on the source side of the match point refuses
to accept *any* voltage or current. 100% of the reflected
energy is re-reflected at the match point.
--
73, Cecil http://www.qsl.net/w5dxp

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