In reply to Michel Jullian's message of Sun, 1 Mar 2009 19:05:42 +0100: Hi Michel, [snip]
Advice given to politicians, is never to ask a question, unless you already know the answer. I think the obvious answer to my own question is that the electron is not a point particle. Mills uses a circular orbit, and gets a very nice value as a consequence. I think it's time that QM got reworked. :) >A very good question Robin, I too would very much like to know the answer! > >The resource below doesn't really provide one, but it does quantify >the (preposterously high, in their opinion) spin rate which would be >required if the intrinsic magnetic moment was due to an actual >spinning little sphere of charge: > >http://hyperphysics.phy-astr.gsu.edu/Hbase/spin.html#c4 > ><<The term "electron spin" is not to be taken literally in the >classical sense as a description of the origin of the magnetic moment >described above. To be sure, a spinning sphere of charge can produce a >magnetic moment, but the magnitude of the magnetic moment obtained >above cannot be reasonably modeled by considering the electron as a >spinning sphere. High energy scattering from electrons shows no "size" >of the electron down to a resolution of about 10^-3 fermis, and at >that size a preposterously high spin rate of some 10^32 radian/s would >be required to match the observed angular momentum.>> > >Why they think it would be preposterous I have no idea, it doesn't >look more preposterous to me than electrons going back in time or >photons going faster or slower than the speed of light, which have >been considered perfectly normal things for many decades. > >Cheers, >Michel > >2009/2/25 <[email protected]>: >> Hi, >> >> The magnitude of the Bohr magneton is essentially based upon a Bohr orbit. >> How >> is that the intrinsic spin magnetic moment of a point particle electron is so >> very close to one Bohr magneton? >> >> Regards, >> >> Robin van Spaandonk >> >> http://rvanspaa.freehostia.com/Project.html >> >> Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html
