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Robert Millikan
1868-1953
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complete name  Robert Millikan
nobel prize  physics
award year  1923
prize share  Prize share: 1/1
rational  The Nobel Prize in Physics 1923 was awarded to Robert Andrews Millikan "for his work on the elementary charge of electricity and on the photoelectric effect."
biography  Biography
laureate facts  Facts
laureate lecture  Lecture
given name  Robert
family name  Millikan
occupation  physicist
occupation  university teacher
field of work  physics
work location  University of Chicago, 5801 S Ellis Ave, Chicago, IL, 60637, United States of America
description  Robert Millikan was an American experimental physicist honored with the Nobel Prize for Physics in 1923 for his measurement of the elementary electronic charge and for his work on the photoelectric effect. Millikan graduated from Oberlin College in 1891 and obtained his doctorate at Columbia University in 1895. In 1896 he became an assistant at the University of Chicago, where he became a full professor in 1910. In 1909 Millikan began a series of experiments to determine the electric charge carried by a single electron. He began by measuring the course of charged water droplets in an electric field. The results suggested that the charge on the droplets is a multiple of the elementary electric charge, but the experiment was not accurate enough to be convincing. He obtained more precise results in 1910 with his famous oil-drop experiment in which he replaced water (which tended to evaporate too quickly) with oil. In 1914 Millikan took up with similar skill the experimental verification of the equation introduced by Albert Einstein in 1905 to describe the photoelectric effect. He used this same research to obtain an accurate value of Planck’s constant. In 1921 Millikan left the University of Chicago to become director of the Norman Bridge Laboratory of Physics at the California Institute of Technology (Caltech) in Pasadena, California. There he undertook a major study of the radiation that the physicist Victor Hess had detected coming from outer space. Millikan proved that this radiation is indeed of extraterrestrial origin, and he named it "cosmic rays." As chairman of the Executive Council of Caltech (the school's governing body at the time) from 1921 until his retirement in 1945, Millikan helped to turn the school into one of the leading research institutions in the United States. He also served on the board of trustees for Science Service, now known as Society for Science & the Public, from 1921 to 1953.
image copyright  Photo from the Nobel Foundation archive.
image citation  The Nobel Prize in Physics 1923. NobelPrize.org. Nobel Media AB 2018. <https://www.nobelprize.org/prizes/physics/1923/summary/>
date birth  1868
date death  1953
usual name  Robert Millikan