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Cherenkov radiation
(redirected from Cerenkov radiation)

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Cherenkov radiation

Type of electromagnetic radiation emitted by charged particles entering a transparent medium at a speed greater than the speed of light in the medium. It appears as a bluish light. Cherenkov radiation can be detected from high-energy cosmic rays entering the Earth's atmosphere. It is named after Pavel Alexseevich Cherenkov, the Russian physicist who first observed it.



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Paula Chadwick of the University of Durham in England and her colleagues recorded flashes of blue light known as Cerenkov radiation, which is produced when Earth's atmosphere stops incoming gamma rays.
Gamma view of a big blast by Science News
Aside from black-body radiation, they listed a number of other possible sources of illumination: crystalloluminescence, produced when chemicals crystallize; sonoluminescence, powered by the sound of bubbles collapsing; triboluminescence, created when rock crystals crack; and Cerenkov radiation and scintillation, both caused by the radioactive decay of elements in the vent water.
Light at the bottom of the ocean by Science News
Analogous to a shock wave, this light, called Cerenkov radiation, appears when the speed of particles exceeds that of light in the medium through which they're moving.
Catching some rays: Earth-based detectors hunt for violent stellar ... by Cowen, Ron / Science News
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