On Mon, 31 May 2010 07:09:49 -0700 (PDT), K1TTT
wrote:

ah, but in this case consider that you have a pint of blue water
moving to the right and a pint of red water moving to the left to be a
better analogy to currents of the waves moving forward and backward in
the coax.
....
the result is that both waves continue
on their way undisturbed by the other... which is what is observed in
all cases of em wave interaction in linear media.

Miguel, I want you to note how David clearly exposes the failure of a
metaphor, using the metaphor's own analogy.

This is the danger of trying to explain one system in terms of another
without knowing how either work.

It also reveals in shades of deep purple, how the visual system lies
to us, and we believe we see the Truth.

So, for metaphors and analogies, when the reader knows better, its a
lark (an amusing adventure or escapade); or when the writer knows
better, its a lark (behavior in a mischievous way).

If you both don't know better, its a lark (activity regarded as
foolish or a waste of time by the rest of us).

Carefully parse the following:
"Truth is a lark."

73's
Richard Clark, KB7QHC