‎CORNU Alfred‎
‎Sur la Méthode Doppler-Fizeau permettant la détermination, par l'analyse spectrale, de la vitesse des astres dans la direction du rayon visuel ‎

‎Paris Imprimerie Gauthier-Villars et fils s.d. [1891] in-8 broché ‎

Reference : 25958


‎40 pp.Rare extrait de l'Annuaire du bureau des longitudes. Le polytechnicien Alfred Cornu (1841-1902) est surtout connu pour ses travaux sur la diffraction de la lumière. Il reprit et développa l'expérience de la roue dentée d'Hippolyte Fizeau portant sur la mesure de la vitesse de la lumière, en introduisant un dispositif électrique d'enregistrement de la vitesse de rotation de la roue ; ses trois expériences successives (1872, 1874) permirent d'affiner les résultats obtenus par Fizeau.Un seul exemplaire au CCFr (Observatoire) ‎

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1 book(s) with the same title

‎CORNU (A.)‎

Reference : 5956

‎Sur la méthode Doppler-Fizeau permettant la détermination par l'analyse spectrale de la vitesse des astres dans la direction du rayon visuel. 1891, 40pp. --- Notice sur la corrélation des phénomènes d'électricité statique et dynamique et la définition des unités électriques. 1893, 75pp. --- Les forces à distance et les ondulations. 1896, 26pp. --- Les travaux de Fresnel en optique. 1896, 35pp. --- Notice sur l'oeuvre scientifique de H. Fizeau.1898, 40pp. --- Unités électriques usitées dans les applications de l'électricité. 1899, 36pp. --- Les machines génératrices de courants électriques. 1900, 89pp. --- Le transport électrique de la force. 1901, 67pp. --- Les courants polyphasés. 1902, 91pp ---- soit NEUF TIRES-A-PART (NINE OFFPRINTS) DE MEMOIRES PUBLIES PAR A. CORNU DANS L'ANNUAIRE DU BUREAU DES LONGITUDES RELIES EN UN VOLUME --- BEL EXEMPLAIRE‎

‎P., Bureau des Longitudes, 1891-1902, un fort volume in 8 relié en demi-chagrin rouge (reliure de l'époque)‎


‎---- TRES RARE REUNION DE MEMOIRES ORIGINAUX DE A. CORNU ---- ENVOI DE A. CORNU A SON CAMARADE GENTY ainsi libellé : "Au Camarade GENTY - Souvenir amical - signé cornu" ---- BEL EXEMPLAIRE ---- "A series of experiments dating from 1871 led to a redetermination of the velocity of light by Fizeau's method, for which Cornu was awarded the La Caze Prize and the Rumford Medal. Cornu made a number of important contributions to spectrum analysis including very precise measurements of the wavelenghts of certain lines in the hydrogen spectrum. By observing the dges of the solar disk and applying the Doppler-Fizeau principle, he found a means of separating the solar spectra from the terrestrial spectra ; in the case of the latter he separated the influence of water vapor from that of air. Following the discovery of the Zeeman effect Cornu showed that the D line of sodium is decomposed, under normal magnetization, into four components, as opposed to three, thus forcing Lorentz to modify his theory of the Zeeman effect. Cornu's optical researches also included studies of conditionsfor achromatism in interference phenomena ; his work on measurement of the curvature of lenses ; and his explanation of vertain observed anomalies in the behavior of diffraction gratings in terms of minute variations in the distance between successive lines... Cornu is remembered for the elegant method of the so-called Cornu spiral for the determination of intensities in interference phenomena". (DSB III)**5956/M2‎

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