This phenomenon has been used to detect the presence of subatomic particles such as neutrinos. It occurs in part because the index of refraction of a material does not scale with the adsorption cross-section, and thus a particle can travel faster than the relative speed of light in a given medium. FTP, what is this effect, usually appearing as a wake of blue light, named for the Russian scientist 
This phenomenon has been used to detect the presence of subatomic particles such as neutrinos. It occurs in part because the index of refraction of a material does not scale with the adsorption cross-section, and thus a particle can travel faster than the relative speed of light in a given medium. FTP, what is this effect, usually appearing as a wake of blue light, named for the Russian scientist who first observed it in 1934?
This phenomenon has been used to detect the presence of subatomic particles such as neutrinos.
{Cherenkov} radiation