Cecil Moore wrote:
Gene Fuller wrote:
Cecil Moore wrote:
As you well know, the convention is to apply a negative
sign to positive energy flowing in the opposite direction
from the "forward" energy which is arbitrarily assigned
a plus sign.

Let's see even one reference that mentions explicitly the concept of
applying a negative sign to positive energy. Not power, not voltage,
not current, not waves, but energy.

If you keep feigning ignorance like that Gene, you are
going to lose all respect. If the Poynting vector has
a negative sign, as used by Ramo & Whinnery, that sign
is an indication of the *direction of energy flow*,
see quote below.

From Ramo & Whinnery:

The Poynting vector is "the vector giving *direction* and
magnitude of *energy flow*". When Ramo & Whinnery hang a
sign on a Poynting vector in a transmission line, it is
an indication of the direction of energy flow.

For pure standing waves,
"The average [NET] value of Poynting vector is zero
at every cross-sectional plane; this emphasizes the
fact that on the average as much energy is carried
away by the reflected wave as is brought by the
incident wave."

What? Reflected waves "carrying" energy? Shame on
Ramo & Whinnery for contradicting the rraa gurus.

It is impossible to satisfy you, Gene. When I quote
reference after reference about reflected power, you
say power doesn't reflect. When I change it to reflected
energy, you ask for a reference.


Cecil,

Still up to your tricks? I ask for reference on a scalar quantity, and
you respond with some stuff about vectors.

If you want to continue to misinterpret the experts and believe that
power, energy, or whatever flows in opposite directions at a single
point at the same time, go right ahead. I suppose such beliefs expounded
on RRAA are quite harmless in the grand scheme of world affairs.

For future reference, however, just remember: Fields first, then power
or energy. That's the way superposition really works.

(By the way, I am not the one who made the point about power vs. energy.
That must have been someone else.)

73,
Gene
W4SZ