Roy Lewallen wrote:

I think the fundamental problem here is that the concept of waves of
average power necessarily assumes nice, smooth, non-varying "waves" of
DC (average) power flowing along the line. When two of these "waves"
occupy the same space, they necessarily combine to form another smooth
combination net "wave". There's no way to account for the reality that
power and energy are *not* flowing in smooth, DC waves, but rather as a
time-varying function. Power is flowing back and forth each cycle, and
energy is moving into and out of storage each cycle. The time-varying
information is thrown away as soon as the average is taken, and it can't
be retrieved.

Who needs it? Of what use is it? Don't phasors contain all the important
information? What problem are you trying to solve by resorting to
instantaneous energy and/or power? You will never understand
instantaneous energy until you understand virtual photons. That's a
reasonable statement based on the latest quantum electrodynamics. Do
you understand virtual photons? Are you going to try to understand
virtual photons in order to really understand instantaneous energy?
If not, why not? Methinks you are the pot calling the kettle black.

So if all you can envision is waves of average power, it's
impossible to understand what's really happening with respect to power
and energy along the line. You simply don't have the information
necessary to envision or understand it.

The optics physicists have done just fine understanding everything while
dealing with irradiance (average power). Instantaneous power is simply
not a very useful concept except in some esoteric applications.
--
73, Cecil http://www.qsl.net/w5dxp



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