On Jun 4, 5:39*pm, Keith Dysart wrote:
So are you really prepared to give up on P=VI so that energy can be
flowing (i.e. there is power) when the voltage or current is zero?

Your equation is for DC power. The equation for net AC power is
P=V*I*cos(theta). Since, for a pure standing wave, the net voltage is
always 90 degrees out of phase with the net current, the net power at
ALL points is zero, not just at the I=0 point. cos(theta) is ALWAYS
zero for a pure standing wave whether I=0 or not - so your argument is
moot. For a pure standing wave, P = V*I*cos(theta) is ALWAYS zero. I
or V going to zero cannot make it more zero than it already is.

For a pure standing wave, the forward Poynting vector and the
reflected Poynting vector sum to zero AT ALL POINTS.
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73, Cecil, w5dxp.com