Remarks on the Relationship between Electron Interference and Electron Polarization



In relation to a recent paper by INTHOFF it is pointed out that it is legitimate to describe the polarization accompanying the interference of electron beams as resulting from the spin-dependence of the wavelength of the electrons while they are in an electromagnetic field. Using a semi-classical argument it is shown furthermore that an electron optic “biprism” would give a detectable polarization effect only if on account of its very high gradient the field constituting the biprism could not be considered constant over a region whose linear dimensions are comparable with the Compton wave length of the electron.