A collimated beam of electrons with kinetic energy K = 1.65 keV is passed through a laser cavity generating at a wavelength l = 0.63 μm. At some angles of incidence of the beam relative to the laser axis, close to a straight line, Bragg scattering of electrons on an electromagnetic wave (Kapitsa-Dirac effect) can be observed. Find these angles.
Answer. Format gif
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