Radioactivity was discovered by HenriBecquerel in 1896.
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It began in 1896 when HenriBecquerel in Paris carelessly left a packet of uranium salts on a wrapped photographic plate in a drawer.
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In honor of that discovery, the Curies shared the 1903 Nobel Prize in physics with their French colleague HenriBecquerel for his work with uranium.
Ús de Becquerel en anglès
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In 1896 Becquerel brought us to the threshold of the great discovery.
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In 1903 the Curies and Becquerel were jointly awarded the Nobel Prize in physics.
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This experience at least was as up-to-date as the Curies, Becquerel, Ramsay, and the rest.
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First of all I took out the two Becquerel ray-condensers that I had bought in Sydney.
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Radioactivity was discovered by Henri Becquerel in 1896.
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Seebeck, Becquerel, and others, also touched the discovery.
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Arago, F. Extracts from, in Becquerel, Des Climate.
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It was developed and maintained by those 'admirable electricians,' Becquerel, of Paris, and De la Rive, of Geneva.
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He began his scientific career as assistant to Edmund Becquerel at the Conservatoire des Arts et Métiers at Paris.
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A "Becquerel" is a unit of radioactivity.
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This work was effected by Professor Giesel, then by M. Becquerel, Professor Rutherford, and by many other experimenters after them.
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The image above, from the Mars Reconnaissance Orbiter (MRO) website, shows the nature of these exposures in Becquerel Crater.
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Conducting an experiment using photographic plates, Becquerel found that the plates were already fully exposed before being subjected to bright sunlight.
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Some ingenious researches by M. Becquerel and M. Cotton have perfectly elucidated all these complications from an experimental point of view.
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The researches on radioactive substances have their starting-point in the discovery of the rays of uranium made by M. Becquerel in 1896.
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In 1896 H. Becquerel discovered that compounds of the metal uranium continually emitted rays capable of penetrating opaque screens and affecting photographic plates.