Richard Clark wrote in
:

On Fri, 20 Apr 2007 05:38:37 GMT, Owen Duffy wrote:

"I maintain that there is
actually zero field at a point of superposition of multiple waves
which sum to zero, and that no device or detector can be devised
which, looking only at that point, can tell that the zero field is a
result of multiple waves."

Hi Owen,

This seems to be in distinct contrast to what appeared to be your goal
earlier - insofar as the separation of sources (you and others call
them waves). I am trying to tease out just what it was that impelled
you upon this thread.

Richard

I still have a problem reconciling the resultant E field and H field,
including their direction, with the concept that they are not evidence of
another wave. I am not suggesting there is another wave, there is good
reason to believe that there isn't, but that if there isn't another wave,
is the resultant E field, and H field (including direction) a convenient
mathematical representation of something that doesn't actually exist.

In answer to your last question, a quest for understanding. I don't know
the answer, but the discussion is enlightening.


And we haven't mentioned power, not once!

Not specifically so, but inferentially, certainly. We see the term
detector employed above, and it cannot escape the obvious implication
of power to render an indication. Perhaps the relief expressed by
your sentiment is in not having to have had added or subtracted power
(or any other expressions of power).

Basically. Some of the problems in the analysis are as a result of trying
to determine conditions at a point, which can have no area, and
presumably no power, but yet E field and H field.

I think the discussion is mainly exploring a detailed definition of the
concept of superposition of radio waves. It seems to mean different
things to different people, but it is used as if it has a shared meaning.

Owen