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Robert Andrews Millikan was born on the 22nd of March in Morrison (USA). He led a rural existence in childhood. After his graduation in 1891 he took, for two years, a teaching post in elementary physics. It was during this period that he developed his interest in the subject. In 1893, after obtaining his mastership in physics, he was appointed Fellow in Physics at Columbia University. As a scientist, Millikan made numerous momentous discoveries, chiefly in the fields of electricity, optics, and molecular physics. Throughout his life Millikan remained a prolific author, making numerous contributions to scientific journals. During World War I, Millikan was Vice-Chairman of the National Research Council, playing a major part in developing anti-submarine and meteorological devices. He died on the 19th of December in 1953 in San Marino, California.

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Millikan wanted to prove that electricity really has the atomic structure, wich, on the base of theoretical evidence, it was supposed to have. In 1910 he succeeded in precisely determining the magnitude of the electron's charge.

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Small electrically charged drops of oil were suspended between two metal plates where they were subjected to the downward force of gravity and the upward attraction of an electrical field. By measuring how the various drops of oil moved about, Robert Millikan showed that their charge always was a multiple of a precisely determined charge - the electron's charge. He founds out that the eletric charge is quantized

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Robert A. MIllikan received the nobile prize in physics in 1923 for his work on the elementary charge of electricity and on the photoelectric effect.
Attached the Award Ceremony Speech

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Nobel Prize in Physics 1923 - Presentation Speech

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Nobelprize.org, The Official Web Site of the Nobel Prize

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Marta Vecchio, Giulia Galimberti.
S.y. 2017-2018, LSS Vittorio Veneto, Milano