As someone else said, "diffraction grating theory is full of holes"... . hehehehe -

Ebbie -

The fool who thinks he is a fool is for that very reason a wise man;
But the fool who thinks he is a wise man is rightly called a fool.

Here is your Zen of the Day:
The ten thousand questions are one question. If you cut through the one question, then the ten thousand questions disappear.

:-)

I have speculated all I can with the available information, sorry... I call defeat de feet ... :-)