A. E. Becquerel

Infobox Scientist
name = A. E. Becquerel
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birth_date = birth date|1820|3|24
birth_place = Paris
death_date = death date and age|1891|5|11|1820|3|24
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nationality = French
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field = Physics
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Alexandre-Edmond Becquerel (March 24, 1820 - May 11, 1891) was a French physicist who studied the solar spectrum, magnetism, electricity, and optics. He is known for his work in luminescence and phosphorescence. He discovered the photovoltaic effect, which is the physics behind the solar cell, in 1839. [cite journal
title = Becquerel Photovoltaic Effect in Binary Compounds
author = R. Williams
journal = The Journal of Chemical Physics
year = 1960
volume = 32
issue = 5
pages = 1505–1514
doi = 10.1063/1.1730950] [cite journal
title = Mémoire sur les effets électriques produits sous l'influence des rayons solaires
author = A. E. Becquerel
journal = Comptes Rendus
year = 1839
volume = 9
issue =
pages = 561–567
url = http://gallica.bnf.fr/ark:/12148/bpt6k2968p/f561.chemindefer] He was the son of Antoine César Becquerel and the father of Henri Becquerel.

Becquerel was born in Paris, and was in turn the pupil, assistant and successor of his father at the Musee d'Histoire Naturelle. He was also appointed professor at the short-lived Agronomic Institute at Versailles in 1849, and in 1853 received the chair of physics at the Conservatoire des Arts et Metiers. Becquerel was associated with his father in much of his work, but he himself paid special attention to the study of light, investigating the photochemical effects and spectroscopic characters of solar radiation and the electric light, and the phenomena of phosphorescence, particularly as displayed by the sulfides and by compounds of uranium. It was in connection with these latter inquiries that he devised his phosphoroscope, an apparatus which enabled the interval between exposure to the source of light and observation of the resulting effects to be varied at will and accurately measured.

Becquerel published in 1867-1868 a treatise in two volumes called "La Lumière, ses causes et ses effets". He also investigated the diamagnetic and paramagnetic properties of substances; and was keenly interested in the phenomena of electrochemical decomposition, accumulating much evidence in favor of Faraday's law of electrolysis and proposing a modified statement of it which was intended to cover certain apparent exceptions.

References

*1911
*cite journal
author = A. Allisy
title = Henri Becquerel: The Discovery of Radioactivity
journal = Radiation Protection Dosimetry
volume = 68
issue =
pages = 3–10
year = 1996
url = http://rpd.oxfordjournals.org/cgi/content/abstract/68/1-2/3