tom wrote:
Art Unwin wrote:

Equilibrium is when there is no gain. When this occurs there is
polarisation purity.
Gain is not a factor in equilibrium so why muddy up the question. Or
is that being arrogant
because you disagree with me LOL


Oops missed one right in front of my lying eyes.

Equilibrium ==

1) no reflections.

2) isotropic.

3) no gain.

4) polarization purity.

tom
K0TAR