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Cherenkov radiation
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Cherenkov radiation
Cherenkov radiation
, also known as
Vavilov–Cherenkov radiation
, is
electromagnetic radiation
emitted when a
charged
particle
(such as an
electron
) passes through a
dielectric
medium at a
speed
greater than the
phase velocity
of
light
in that medium. The characteristic blue glow of an underwater
nuclear reactor
is due to Cherenkov radiation. It is named after
Soviet
scientist
Pavel Alekseyevich Cherenkov
, the 1958
Nobel Prize
winner who was the first to detect it experimentally. A theory of this effect was later developed within the framework of
Einstein
's
special relativity
theory by
Igor Tamm
and
Ilya Frank
, who also shared the Nobel Prize. Cherenkov radiation had been theoretically predicted by the
English
polymath
Oliver Heaviside
in papers published in 1888–89.
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