The Cherenkov effect A charged particle traveling in a dielectric medium with n>1 radiates Cherenkov radiation if its velocity is larger than the phase velocity of light v>c/n or Î² > 1/n (threshold) The emission is due to an asymmetric polarization of the medium in front and at the rear of the particle, giving rise to a varying electric dipole momentum.
cyclo-. 1. Combining forms relating to a circle or cycle; or denoting an association with the ciliary body. 2. In chemistry, a combining form indicating a continuous molecule, without end, or the formation of such a structure between two parts of a molecule.
pyro-. 1. Combining form denoting fire, heat, or fever. 2. In chemistry, combining form denoting derivatives formed by removal of water (usually by heat) to form anhydrides.yro-, prefix meaning fire or heat, or produced by heating: pyrocatechin, pyrodextrin, pyromania.