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Old June 5th 10, 12:54 AM posted to rec.radio.amateur.antenna
K1TTT K1TTT is offline
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Default Question about "Another look at reflections" article.

On Jun 4, 10:39*pm, Keith Dysart wrote:
On Jun 4, 1:26*pm, K1TTT wrote:

On Jun 4, 2:12*pm, Cecil Moore wrote:
Thanks David, that's good news. It apparently means that the arguments
based on energy not crossing a current node boundary in a standing
wave are invalid - since that singular condition violates the boundary
conditions for Maxwell's equations. So does the "standing wave energy
standing still" argument. Not only does the photonic nature of EM
waves require them to travel at the speed of light in the medium, but
so does Maxwell's equations.


definately. *another simple condition shows this can't be correct
since current nodes correspond with voltage peaks in the standing wave
pattern, so while energy in the magnetic field is a minimum the energy
in the electric field is a maximum.


And yet....

It is generally accepted that power = volts times current (P=VI) and
that
power is energy flowing, so if the voltage or current is always 0,
there
must be no energy flowing.

The presence of voltage without current, or current without voltage is
an indication that energy is stored, not that energy is flowing.

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?

...Keith


that is just another flaw in the 'standing wave' problem. since they
are not real waves that propagate and move energy the P=VI formula is
not correct. you must take the original traveling waves and study the
power and energy using them, from that you should see the proper
results.