On Sun, 11 Jan 2009 22:37:47 -0800, Jeff Liebermann
wrote:
Unfortunately, the real answer is messy. See item #4 in the Physics
FAQ:
"Do Photons Move Slower in a Solid Medium?"
http://www.physicsforums.com/showthread.php?t=104715
Also #6 in the FAQ:
"Do Photons Have Mass?"
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Jeff Liebermann
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