Richard Clark wrote:
On Sat, 19 Jan 2008 23:40:43 -0800 (PST),
wrote:
The only person I've ever seen claiming that there is energy
in non-existant waves is you, Cecil.
Hi Jim,
That's not strictly true. I for one have always maintained there is
energy where it cancels, it is also somewhere else when it adds.
I was unaware that your belief system coincided with Cecil's in this
regard. I now acknowledge knowing of two such people who believe in
energy in nonexistent waves. Perhaps others will join in.
As for the non-existence of waves, I would read this as the resultant
combination of two waves exhibiting a null at a locality.
This particular "locality" is the point of discussion. That there is
energy at other localities is another matter.
Let's simply divorce the second source and look at the dipole. It
clearly is a source of energy, no one is going to deny that I hope
(OK, Cecil will as this post is draining the numbers on his celebrity
status). We can still discuss fields (includes DC then) or waves
(extending to AC/RF). We can combine them, every text does this in
the first chapter. We find a line bisecting the dipole with a null
response. An infinitesimal point residing in the infinite bisecting
plane can't tell the difference between a null and no field/wave
certainly. Is energy non-existent? The tug of war informs us
otherwise. Turn off the dipole, and you win the argument of
non-existent energy - but the rope collapses to the ground, falling
out of its 2D shape. Even for the tug of war, the evidence still
differentiates between the two circumstances.
This non-existence blossoms into:
Even Yagi antennas fail to radiate energy from their null points.
such is the well from which Arthur draws his inspiration.
No, actually it comes from the notion that where there are no
electromagnetic waves there is no electromagnetic energy, and vice versa.
Antennas radiate equally in all directions from all points. Nulls are
the products of the sums of those radiations at a remote point.
A point which blossoms into the notion that antennas radiate
nonexistent waves carrying nonexistent quantities of energy in certain
directions.
73, ac6xg