Electromagnetic Radiation of an Oscillating Charged Viscous Drop of Finite Conductivity

The dispersion equation for the capillary oscillations of a charged drop of viscous incompressible fluid of finite electrical conductivity with account for energy loss by electromagnetic-wave radiation is obtained. It is shown that the intensity of the energy loss associated with the electromagnetic radiation of the oscillating drop increases with its conductivity, charge and the surface mobility of the charge carriers. The intensity of the background radiation of a cumulus cloud is estimated.