Archived posting to the Leica Users Group, 2003/07/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]According to http://www-psych.stanford.edu/~lera/psych115s/notes/lecture2/ "Absorbing even a single photon of light in a rod is enough to evoke a regular/reliable photocurrent. In fact, Hecht, Schlar and Perrine demonstrated in the 40's that human subjects can reliably detect single photons." I think that is also what Feynman said, but I cannot find the reference -- all my books are still in boxes. I can also heartily recommend Feynman's "Six Easy Pieces" -- recorded on CD - -- for a layman's introduction to Physics. - -- Clive http://clive.moss.net > -----Original Message----- > From: owner-leica-users@mejac.palo-alto.ca.us > [mailto:owner-leica-users@mejac.palo-alto.ca.us] On Behalf Of > Adam Bridge > Sent: Wednesday, July 16, 2003 3:54 PM > To: leica-users@mejac.palo-alto.ca.us > Subject: RE: [Leica] digital glass > > > On 2003-07-16 saganicc@MSKCC.ORG (Saganich, > Christopher/Medical Physics) > thoughtfully wrote: > There's a wonderful little book by, of all people, Richard > Feynman, called "QED" > that does a very good job of explaining all of this. I > remember he points out > that our eyes need only be an order of magnitude more > sensative and we'd not be > debating it at all because we're that close to being able to > image individual > photons. An amazing thing when you think about it. - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html