In reply to Bob Cook's message of Mon, 14 Dec 2015 20:02:40 -0800: Hi, [snip] > > >Where does the photon get its angular momentum, when it and its twin appear >from positron-electron enillalation?
Both have opposite spins, so the net is zero. > >I am not familiar with what line splitting the cyclotron frequency is. If I'm not mistaken, line splitting occurs when the magnetic field, due to the spin of a bound electron in a magnetic field, causes what would otherwise be a single spectral line to be split into two close lines, one above the original frequency, and one below. When the magnetic field is turned off, the 2 lines are replaced by 1. If free electrons had a spin magnetic moment, then I would expect this to also happen for cyclotron radiation. If it does, then I'm obviously wrong about electron intrinsic spin. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html

