Discovery of radioactivity
Numéro d’image : 11905362
| 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 | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library |
| Taille de l’image : | 3275 px × 2641 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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