  For the perturbative model of a plane gravitational wave on a flat background
of Minkowski space-time, electromagnetic radiation from a charged cloud in the
field of a gravitational wave, detected by a remote observer, was found. It is
shown that the charge density in the cloud does not change, and the radiation
is generated by currents induced by the gravitational wave. The angular
distribution of the radiation is obtained. If the refractive index of the cloud
medium is greater than unity, Cherenkov-type radiation is generated.
