My understanding is that adding energy (angular, in this case) to the photon makes it easier to see the state than otherwise would be possible.
My understanding is limited, in that particular area, since we barely covered it. I paid more attention to sauces, stocks, and breads during culinary school. ;)
/johnny
13 posted on 11/07/2012 6:21:08 PM PST by JRandomFreeper
(Gone Galt)