According to the theory of relativity, a particle cannot be accelerated to  a velocity greater than that of the speed of light in a vacuum.
According to the theory of relativity, a particle cannot be accelerated to  a velocity greater than that of the speed of light in a vacuum. In  dielectrics, however, the speed of light becomes the speed of light in a  vacuum divided by the refractive index for the medium. If a charged particle  is accelerated to a velocity near the speed of light and then injected into a  dielectric, then THIS is emitted. FTP, name this radiation emitted by a  charged particle moving through a medium with a velocity greater than the  speed of light in that medium.
According to the theory of relativity, a particle cannot be accelerated to  a velocity greater than that of the speed of light in a vacuum.
Cherenkov Radiation