ABSTRACT
Analyses of reabsorption often employ expressions for the intensity of the radiation emitted by a single particle that are averaged over all directions. The character of reabsorption is, of course, closely related to the origin of the radiation under consideration; that is, in the case of reabsorption of synchrotron radiation the emitting particles are relativistic charged particles moving in a magnetic field. Circular or elliptical polarization of the synchrotron radiation emitted by a system of electrons with a quasi-isotropic distribution can occur either in the case of not too high relativistic electron energies or when the effect of the plasma anisotropy is taken into consideration. The very subject of the reabsorption problem implies the influence of the relativistic plasma in the source on the wave absorption. This plasma must also produce some effect on the refractive index, and the medium is anisotropic.
