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Jean-Baptiste Perrin - Physics - 1926

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Jean-Baptiste Perrin - Physics - 1926

Jean-Baptiste Perrin - Nobel Physique - 1926

Jean Baptiste Perrin was born on September 30, 1870 in Lille and died April 17, 1942 in New York. He was a physicist, chemist and French politician.
He received the Nobel Prize for Physics in 1926 for his work on the atom. In 1895, Perrin showed that cathode rays are composed of particles of negative electrical charge.
He determined the Avogadro number by several methods.
After Albert Einstein had published (1905) his theoretical explanation of Brownian motion based on the random motion of molecules, Perrin carried out the experiments to test the predictions of Einstein.
He showed (1908) a complete agreement between theory and experiment, which confirms once and for all the actual existence of atoms, proposed a century before by John Dalton, and simultaneously determines a precise value of the Avogadro number.