On Dec 23, 2:34*pm, (Richard Harrison)
wrote:
Keith Dsart wrote:

"Therefore, the forward and reverse waves can not be transferring energy
across these points."

A wave is defined as a progressive vibrational disturbance propagated
through a medium, such as air, without progress or advance of the parts
or particles themselves, as in the transmission of sound, light, and an
electromagnetic field. Light, for example, is also calld luminous or
radiant energy. Sound and radio waves are also examples of energy in
motion.

Waves in motion are transporting energy no matter how their constituents
seem to add at a particular point.

Best regards, Richard Harrison, KB5WZI

But in the example there was a transmission line
on which the actual instantaneous voltage and
current can be measured.

And P = V * I seems rather fundamental, so V or
I is always 0, then P must always be 0.

Jumping to disussing waves does not alter this.

...Keith