What is Cherenkov radiation?
{{Use dmy dates|date=November 2020}} [[File:Cerenkov Effect.jpg|thumb|250px|top|[[Nuclear Regulatory Commission|NRC]] photo of Cherenkov effect in the [[Reed Research Reactor]]]] '''Cherenkov radiation''', also known as '''Vavilov–Cherenkov radiation'''<ref>{{cite journal|last=Cherenkov|first=P. A.|year=1934|title=Visible emission of clean liquids by action of γ radiation|journal=[[Doklady Akademii Nauk SSSR]]|volume=2|page=451|authorlink=Pavel Alekseyevich Cherenkov}} Reprinted in Selected Papers of Soviet Physicists, ''[[Usp. Fiz. Nauk]]'' 93 (1967) 385. V sbornike: Pavel Alekseyevich Čerenkov: Chelovek i Otkrytie pod redaktsiej A. N. Gorbunova i E. P. Čerenkovoj, M., [[Nauka (publisher)|Nauka]], 1999, s. 149-153. ([http://dbserv.ihep.su/hist/owa/hw.move?s_c=VAVILOV+1934&m=1 ref] {{webarchive|url=https://web.archive.org/web/20071022200847/http://dbserv.ihep.su/hist/owa/hw.move?s_c=VAVILOV+1934&m=1|date=22 October 2007}})</ref> ({{IPAc-en|tʃ|ə|ˈ|r|ɛ|ŋ|k|ɒ|f}};<ref>{{Dictionary.com|Cherenkov|accessdate=26 May 2020}}</ref> [[Russian language|Russian]]: Черенков) is a type of electromagnetic radiation produced by charged particles when they pass through an optically transparent medium at a speed which is greater than the speed of light in that medium.<ref name= britannica1>{{cite web |url= https://www.britannica.com/science/Cherenkov-radiation |title= Cherenkov radiation |date= 4 Oct 2018| publisher= Encyclopedia Britannica}}</ref> (This does not violate special relativity because the [[refractive index]] slows down the speed of light in a medium. As such, the particle does not have to travel at or faster than the [[speed of light]] in a vacuum, just that of the material it is traveling through.) It is named after [[Pavel Alekseyevich Čerenkov]], who discovered this phenomenon in 1934 under the supervision of [[Sergey Vavilov]]. Igor Tamm and Ilya Frank developed a theory on this effect in 1937. Pavel Čerenkov, [[Igor Tamm]] and [[Ilya Frank]] shared the 1958 [[Nobel Prize in physics]] because of their contributio