SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
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Ilya Frank (1908-1990), Soviet-Russian physicist. Frank shared the 1958 Nobel Prize for Physics with Pavel Alekseyevich Cherenkov and Igor Yevgenyevich Tamm. The share of the Nobel was awarded for Frank's work on the interpretation of the Cherenkov effect. Cherenkov's discovery, in 1934, involved the velocity of high-energy subatomic particles. A high-energy particle moving through water may exceed the velocity of light in that medium. When it does, it creates a 'wake' of light, called Cherenkov radiation. Photographed in Moscow, Russia, in 1964.
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