mardi 24 février 2009

Arago

François Arago (26 February 1786 – 2 October 1853)


"He was a French physicist and astronomer who made major contributions to the early study of electromagnetism including the phenomon of magnetic rotation and the fact that a wire coil could be magnetized by passing electrical current through it. Along with Fresnelon he discovered the principal governing the polarization of light and etablished the theory of light as a wave. He also studies the velocity of sound and made it possible to invent the polariscope. Began the studies of the velocity of light which lead to discoveries."
Ascolto il martedi, JM. Lévy-Leblond , sulla storia delle scienze. Luce e suono si incontrano come due amorosi al giorno per tacersi alla notte. Ascoltate la mia velocità a 1114161726283001 e 161820222302 metri all'ora !
"Working with Jean-Baptiste Biot, Arago made measurements of arc length on the Earth which led the standardisation of the metric system of lengths. Arago's studies in astronomy included investigations of the solar corona and chromosphere, measurements of the diameters of the planets, and a theory that light interference is responsible for the twinkling of star. Aria go also investigated the compressibility, density, diffraction and dispersion of gases and the various types of lightning."
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Sta volta, senza connessione e per ritrovare la qualità, l'intensità, la disperdizione del lampo, andro al Carnaval !
gérard lenorman - rien n'est plus beau - Et moi je chante (1975) - la ballade des gens heureux !

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