On Wed, May 07, 2014 at 09:51:31AM +1200, LizR wrote: > On 7 May 2014 04:58, John Clark <[email protected]> wrote: > > > On Mon, May 5, 2014 at 2:56 PM, John Ross <[email protected]>wrote: > > > When electrons and positrons are destroyed at least two photons are > > produced (my model says there are three photons produced). > > > >> > > Then there is solid evidence your theory is wrong. The mass of the > > electron (and the positron) is 9.1 *10^-31 kilograms, and from E=MC^2 we > > can figure out that's equivalent to 511kev of energy. Gama ray photons of > > exactly 511kev have been detected in electron positron experiments > > performed in particle accelerators and they have also been found radiating > > from the center of our galaxy. This indicates that 2 photons were produced > > when electrons and positrons annihilate each other; if it were three we > > wouldn't see that, we'd see Gamma rays of 341kev because (511+511)/3 = 341. > > > > True, although one could postulate a very very very low energy third photon > on just that basis, currently undetectable. Are any other quantum numbers > involved that might firm up this argument? (What happens to the > electron/positrons' spin? Does it go into the photons' polarisation? (wild > guess!)) >
Conservation of momentum is perhaps a more stringent test here. A third undetectable photon would show up as a momentum deficit in the pair of photons that are observed. Exactly that effect lead to the experimental discovery of the neutrino in the first place. -- ---------------------------------------------------------------------------- Prof Russell Standish Phone 0425 253119 (mobile) Principal, High Performance Coders Visiting Professor of Mathematics [email protected] University of New South Wales http://www.hpcoders.com.au Latest project: The Amoeba's Secret (http://www.hpcoders.com.au/AmoebasSecret.html) ---------------------------------------------------------------------------- -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
