[SI-LIST] Re: Mode conversion question
- From: "Kevin G. Rhoads" <kgrhoads@xxxxxxxxxxxx>
- To: Doug Smith <doug@xxxxxxxxxx>
- Date: Wed, 02 Nov 2011 11:34:04 -0400
>There is no difference one can discern in the action
>of the vector no matter how one thinks of it.
Yes. Typically the various modes form an orthogonal basis. And re-expressing
the present state vector in an alternate basis does not change the vector.
However, mode conversion results in a changed vector, as power is diverted
from one mode to another. Normally that cannot occur as they are orthogonal.
Mode conversion results when that orthogonality is disarranged for a region
and/or time period.
You can choose any set of basis vectors you wish to use, amongst the
possibilities
which are often constrained. Changing your basis only changes your view. No
physical reality changes. That is not mode conversion.
Mode conversion involves physical changes to the progating/evanescent wave(s)
between before mode conversion and after mode conversion.
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