Discovery of radioactivity

Discovery of radioactivity

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This image is part of the feature The Discovery Of Radioactivity 100th Anniversary

Credit: SCIENCE PHOTO LIBRARY

Caption: Discovery of radioactivity. This photograph led to the discovery of radioactivity by Antoine Henri Becquerel in 1896. Dark patches show where he put crystals of uranium salt on a photographic plate. His comments are above. Becquerel (1852-1908) was professor of physics at the Ecole Polytechnique in Paris. He put uranium salt on the plate expecting that when exposed to sunlight it would produce X-rays and fog the plate. But since it was cloudy he put the experiment in a drawer; three days later, on 1 March 1896, he developed the plate anyway. It had been fogged by uranium salt alone. Becquerel realised he had found a new form of radiation. He won the Nobel Prize for physics in 1903.

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Keywords: 1896, 1896 radioactivty, becquerel, evidence, first, first image of radioactivity, historical, history of science, odyssey, photo, photograph, photographic, photography, photos, radioactivity, radioactivity 1896, radioactivity image

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