Diffraction of electrons on the travelling electromagnetic wave

The quantum effect of diffraction scattering of the electron on the travelling electromagnetic wave in the presence of the third body has been found. As the third body, the refracting medium, the division bounds of different mediums or any inhomogenity of it, the atomic nucleus, screens, openings (giving diffraction emission) etc. may appear. The cause of this effect is physically connected with the real absorption and emission of non-vacuum quanta, the concrete mechanism of which is conditioned by the direct and inverse induced Cherenkov, transitional, bremsstrahlung, diffraction effects respectively. Owing to the real absorption-emission the scattering is inelastic, so the diffraction on the travelling wave is accompanied by the acceleration of electrons (one half decelerates).