Arago, François

   astronomer, physicist, political figure
   Born in Estagel, Pyrénées-Orientales, François Arago, through the influence of pierre-simon laplace, was appointed secretary of the Bureau of Longitudes. In 1806, with jean-baptiste BiOT,he measured the arc of the terrestrial meridian in Spain, which, in turn, led to the discovery of the phenomenon of the production of magnetism by rotation and proof of the relationship between the Aurora and variations in terrestrial magnetism. Professor at the École polytechnique, director of the observatory, then of the Bureau of Longitudes, he served as a leftist deputy from 1830 to 1848. A member of the provisional government after the Revolution of February 1848, as minister of war and the navy, he helped to pass the laws abolishing slavery in the colonies. Elected to the Constituent Assembly, member of the executive commission, and deputy to the Legislative Assembly (May 1849), he left political life after the coup d'état of December 2, 1851. Arago's other scientific work covered various fields. A supporter of the undulatory theory of light, he measured, with Biot, the index of reflection of several gases, discovering the rotary and chromatic polarization of light, especially by observing the Aurora. With André-Marie Ampère, he studied electromagnetic phenomena and measured the terrestrial magnetic field to determine planetary diameters. In 1839, he helped in the invention of photography by presenting the work done by Jacques Daguerre before the Academy of Sciences. François Arago was himself named to the Academy of Sciences in 1809.

France. A reference guide from Renaissance to the Present . 1884.

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  • Arago, François — ▪ French physicist in full  Dominique françois jean Arago   born Feb. 26, 1786, Estagel, Roussillon, France died Oct. 2, 1853, Paris       French physicist who discovered the principle of the production of magnetism by rotation of a nonmagnetic… …   Universalium

  • François Arago — 25th Prime Minister of France In office 9 May 1848 – 24 June 1848 Preceded by Jacques Charles Dup …   Wikipedia

  • Francois Arago — François Arago Pour les articles homonymes, voir Arago (homonymie). François Arago …   Wikipédia en Français

  • François Jean Dominique Arago — François Arago Pour les articles homonymes, voir Arago (homonymie). François Arago …   Wikipédia en Français

  • François Arago — Ein Arago Medaillon …   Deutsch Wikipedia

  • François Arago — Saltar a navegación, búsqueda François Arago. François Jean Dominique Arago (en catalán Francesc Joan Domènec Aragó, Estagel, 26 de febrero , 1786 – 2 de octubre, 1853) fue un matemático, fí …   Wikipedia Español

  • Francois Arago — François Arago Dominique François Jean Arago (Katalanische Sprache: Francesc Joan Domènec Aragó) (* 26. Februar 1786 in Estagel bei Perpignan; † 2. Oktober 1853 in Paris) war ein französischer Physiker. François Arago studierte an der École… …   Deutsch Wikipedia

  • ARAGO (F.) — ARAGO FRANÇOIS (1786 1853) Après des études secondaires à Perpignan, Arago prépare le concours d’entrée à l’École polytechnique (Paris), où il entre en 1803. En 1805, il est nommé secrétaire du Bureau des longitudes et participe avec Biot à une… …   Encyclopédie Universelle

  • Arago — (François) (1786 1853) physicien et astronome français; ministre en 1848 …   Encyclopédie Universelle

  • François Arago — Pour les articles homonymes, voir Arago (homonymie). François Arago François Arago …   Wikipédia en Français

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