Antoine Henri Becquerel (December 15, 1852, Paris - August 25, 1908, Le Croisic, France) is a French [...]
Antoine Henri Becquerel (December 15, 1852, Paris - August 25, 1908, Le Croisic, France) is a French physicist. He was awarded half the 1903 Nobel Prize in physics (shared with Marie Curie and her husband Pierre Curie).
In 1896, Becquerel discovered radioactivity by chance, while he was researching the fluorescence of uranium salts. On a suggestion from Henri Poincaré, he sought to determine if this phenomenon was of the same nature as X-rays. It is by observing a photographic plate brought into contact with the material that he realizes that she is even impressed when the material has not been subjected to sunlight: the material emits its own radiation without requiring excitation by light. This radiation was called hyperphosphorescence. He announced his results on March 2, 1896, a few days ahead of the work of Silvanus P. Thompson who was working in parallel on the same subject in London. This discovery earned him the Rumford medal in 1900
- European science