Richard Clark wrote:
Any introduction of direction is purely an invention unsupported by
references so far expressed.

You must have missed the IEEE Definition of "power flow vector".
It speaks of "power ... propagating in the wave". Here's another
definition from the IEEE Dictionary:

"power vector - ... a vector whose magnitude is equal to the
apparent power ..." A power vector diagram in three dimensions
appears with this definition along with its direction. There
is a vector for distortion power, reactive power, and active
power, all orthogonal to each other, vectorally adding up to
the total power vector. I'll bet you are rolling Hecht's or
Einstein's eyes again at the concept of "reactive power".

These definitions are conventions from various fields of
engineering. One is not wrong and the other right. They are
simply context based definitions. English is NOT a context
free language. You have your own little sacred cow definitions
from pure physics but please don't try to force them on the rest
of the world. (You would probably say the definition of power in
Chinese is wrong because you can't read it.)

A power company engineer would be confused about your concept of
how the power generated by the generation plant cannot get to the
consumer hundreds of miles away. Ask him what is in his
transmission lines and he will say power, some of it reactive.

Some RF engineers are confused about your concept of how the
power generated by the transmitter cannot get to the antenna.
In fact, if the transmission line is one microsecond long,
the same power measured at the transmitter makes it to the
antenna one microsecond later minus losses. Some incident power
may be rejected by a mismatched load as reflected power, which
is incident upon the source one microsecond later minus losses.
--
73, Cecil http://www.qsl.net/w5dxp

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