Abstract
An electric charge shaken in an homogeneous stationary magnetic field produces both electromagnetic and gravitational waves (Gertsenshtein waves). We first study this process in a homogeneous medium with a refractive index n, expressing the gravitational wave as a simple functional of the electromagnetic field. Then, an inhomogeneous dielectric is considered: under certain conditions, the diffraction of a plane electromagnetic wave by a small dielectric sphere produces a promising gravitational energy flux.
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