On Apr 21, 8:35 am, Cecil Moore wrote:
Keith Dysart wrote:
I have certainly never said that. If you could point me to the words
that misled you into thinking that, I will attempt to clarify your
misunderstanding.

Correct me if I'm wrong. I understood you to say that energy
cannot flow past an instantaneous zero energy point yet there
is an instantaneous zero energy point every 1/2WL in an EM
traveling wave.

Actually I said a zero power point, but you are essentially
correct. If the zero power point is stationary then no energy
can be flowing. When energy is flowing, either there is no
zero power point, or the zero power point is moving as well.

At a given point on the line, when the voltage or current is
always zero then no energy is flowing. When energy is
flowing, the voltage and current will not always be zero at
that point.

There can also be a voltage and current but they can be
90 degrees out of phase so no net energy flows. In this
case, energy will flow first forward then backwards with
an average of zero.

....Keith