HT> colleagues at MIT.  Parcels of light, photons, do not
 HT> possess mass, but a beam of light does carry momentum.  In
 HT> general, when light strikes a mirror, the mirror will
 HT> recoil ever so slightly, and this recoil has previously
 HT> been measured.  But what about a single photon striking a

Well there must be SOME explanation for radiometers.

Paul Rogers, paulgrogers{at}yahoo.com                       -o)
http://www.angelfire.com/or/paulrogers                   /\\
Rogers' Second Law: Everything you do communicates.     _\_V

... Who would imagine that i2 = -1 ?
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