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Langevin, Paul (1872-1946)

From The Hutchinson Dictionary of Scientific Biography
Place: France Subject : biography, physics French physicist who invented the method of generating ultrasonic waves that is the basis of modern echolocation techniques. He was also the first to explain paramagnetism and diamagnetism, by which substances are either attracted to or repulsed by a magnetic field. Langevin was the leading mathematical physicist of his time in France, and contributed greatly to the dissemination and development of relativity and modern physics in general in his country. Langevin was born in Paris on 23 January 1872. He attended the Ecole Lavoisier and the Ecole de Physique et de Chimie Industrielles, where he was supervised by Pierre Curie during his laboratory classes. In 1891 he entered the Sorbonne, but his studies were interrupted for a year in 1893 by his military service. In 1894 Langevin entered the Ecole Normale Supérieure, where he studied under Jean Perrin . Langevin won an academic competition which in 1897 enabled him to go to the Cavendish…
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Full text Article Langevin, Paul

From Philip's Encyclopedia
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Full text Article Langevin, Paul (1872-1946)

From The Hutchinson Dictionary of Scientific Biography
Place: France Subject : biography, physics French physicist who invented the method of generating ultrasonic waves that is the basis of modern echolocation techniques. He was also the first to explain paramagnetism and diamagnetism, by which substances are either attracted to or repulsed by a…
| 885 words
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Full text Article Langevin, Paul

From Chambers Biographical Dictionary
1872-1946 French physicist Born in Paris, he was educated at the École Normale Supérieure, spent a year in Cambridge, and came to the notice of J J Thomson . He returned to Paris to take his doctorate and study with Pierre Curie . In 1909 he was appointed professor of physics at the Sorbonne. …
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Full text Article Langevin, Paul

From The Columbia Encyclopedia
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Full text Article Physics

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Introduction Physics is a branch of science in which the theoretical and the practical are firmly intertwined. It has been so since ancient times, as physicists have striven to interpret observation or experiment in order to arrive at the fundamental laws that govern the behaviour of the universe. …
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Full text Article Curie, Marie

From Britannica Concise Encyclopedia
(born Nov. 7, 1867, Warsaw, Pol., Russian Empire—died July 4, 1934, near Sallanches, France) Polish-born French physical chemist. She studied at the Sorbonne (from 1891). Seeking the presence of radioactivity —recently discovered by Henri Becquerel in uranium—in other matter, she found it in…
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Full text Article Joliot-Curie, (Jean-) Frédéric

From Britannica Concise Encyclopedia
(born March 19, 1900, Paris, France—died Aug. 14, 1958, Arcouest) French physical chemist. In 1926 he married Irène Curie (1900–58), daughter of Pierre and Marie Curie ; he would eventually append her name to his. In 1932 he first observed production of an electron-positron pair. Frédéric and Irène…
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Place : United States of America Subject : biography, chemistry French scientists, husband and wife, who were early investigators of radioactivity. The Curies discovered the radioactive elements polonium and radium, for which achievement they shared the 1903 Nobel Prize for Physics with Henri…
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Full text Article Becquerel, (Antoine) Henri (1852–1908)

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
French physicist. He was awarded the Nobel Prize for Physics in 1903 for his discovery of penetrating radiation coming from uranium salts, the first indication of spontaneous radioactivity . He shared the award with Marie and Pierre Curie . Becquerel was born and educated in Paris. In 1875 he began…
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Full text Article curie

From Merriam-Webster's Medical Dictionary
a unit quantity of any radioactive nuclide in which 3.7 × 10 10 disintegrations occur per second a unit of radioactivity equal to 3.7 × 10 10 disintegrations per second Cu*rie \k -rē\ Pierre (1859–1906) and Marie Słodowska (1867–1934), French chemists and physicists. The Curies were two of the most…
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