Re: Antonym of 'evanescent'?

On Wed, 19 Dec 2007, Salmon Egg wrote:

As a rambling thought, maybe a more meaningful tensor quantity can be
devised to replace the Poynting vector. As a cross product, the Poynting
vector already is a pseudovector. Maybe equivalent wave index can be thought
of as a tensor.

Said tensor quantity to "replace" the Poynting vector would be the Maxwell stress tensor, or perhaps the energy-momentum tensor.

--
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