Light with a maximum of intensity in the blue spectral region, created when charged particles move in a translucent medium at a speed v, this being greater than the speed of light in this medium (v > c0/n, c0 = speed of light in a vacuum, n = refractive index). The threshold Ability to do work or diffuse heat. The unit of energy is th... for the occurrence of Cerenkov Energy dispersion through matter or space. In atomic physics... for Elementary particle with a negative electrical elementary ch... Energy dispersion through matter or space. In atomic physics... in water (n = 1.33) amounts to 260 Kiloelectron volt; 1 keV = 1,000 eV; See 'Electron volt'..