CCI ARCHIVES / SCIENCE PHOTO LIBRARY CCI ARCHIVES / SCIENCE PHOTO LIBRARY
Evidence of positrons. Historical photograph proving the existence of positrons, taken by the Cavendish Laboratory, Cambridge, UK, under the direction of Giuseppe Occhialini and Patrick Blackett, in 1933. Positrons, or antielectrons, are the antimatter counterpart of electrons. Published in The Illustrated London News, England, 1935, in a special issue marking the Silver Jubilee of the reign of King George V (1910-1935).
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