Interaction of the electromagnetic and gravitational perturbations on the radiation-dominated stage of the expansion of the Universe

The behaviour of the electromagnetic and gravitational perturbations at the radiation-dominated stage of the expansion of the Universe is considered. The plasma is described in the non-collisional approximation. It is shown that the formation of the substance accumulations is accompanied by the positive charge accumulation in aggregations. A correlation between the mass and charge of accumulation is found