equation precisely describe antiparticles. a few years after the dirac equation and dirac's hypothesisence of this particle, the american physicist andersen, who observed the arrival of positrons from space, was in a cloud chamber a special magnet was placed along... the curvature of the trajectory, which, so to speak, indicated that the charge of this particle had a plus sign, and the conclusion was made, that is, electrons and positrons were always born in pairs, and here it is important to note that it should the energy expended in order to create this pair is equal to the energy, so to speak, of rest of these particles, that is, it is somewhere more than one giga, mega electronvol, that’s why, since it existed. x-ray radiation with the same power, immediately a hypothesis arose to test this experimentally, which was done; tracks were observed indicating the formation of electron-posited pairs. subsequently, such exotic formations were obtained in the form of positronium, this is a system consisting of an electron and a positron, it existed for a very... short time, but nevertheless