- noun (written as Cerenkov radiation)the light emitted by an electrically charged particle as it travels through a transparent medium at a speed greater than that of light in the same medium
- Radiation, usually in visible wavelengths, produced when atomic particles at high speed meet a medium where the velocity of light is lower than their own velocity upon arrival. Nothing can travel through matter at more than the velocity of light, so the particles are forced to slow down, giving off energy in the process. The blue glow seen in pools in which nuclear reactions are occurring is Cerenkov radiation, which is practical evidence for relativity.
- synonym Cherenkov radiation (written as Cerenkov radiation)
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