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Nov 21, 2023 · Learn what Robert Millikan discovered and the contributions of Robert Millikan to atomic theory. Explore the oil drop experiment and its insights on the electron. Updated: 11/21/2023.
- How did Robert Millikan change the atomic model?Prior to Robert Millikan's famous oil drop experiment, in which he measured the charge on a single electron, it was not known if electrons even had...
- What 3 things did Millikan discover?Robert Millikan made many contributions to our understanding of physics. He is famous for measuring the value of the elementary charge in the oil d...
- What was Robert Millikan's discovery?Robert Millikan is most well known for discovering value of the elementary charge, which is the charge on a single electron. He measured the elemen...
- Introduction
- Small Town
- Scientific Career
- Important Discovery
- Responsibility
- Caltech
- Religion vs. Science
- Important Theories
- Oil Drop Method
- The Full Gamut
Robert Millikan was devoted to teaching and stressed the importance of laboratory-based learning. He also held many administrative and leadership responsibilities in the field of science. Millikan's accomplishments were the design and fine-tuning of experiments that confirmed the most important scientific theories of his time, providing the implica...
Robert Andrews Millikan was born on March 22, 1868 in Morrison, Illinois, the grandson of pioneers who had resettled from New England. He was the second son of six children born to Silas Franklin Millikan, a Congregationalist minister, and Mary Jane Andrews, former dean of women at Olivet College, Michigan. In 1872, the family moved to another smal...
After a short stint as a court reporter, Millikan entered Oberlin College in Ohio (his mother's alma mater) and majored in the Classics, yet was persuaded by an advisor to adapt his fascination with mathematics to teaching physics. He remained teaching elementary physics after graduating in 1891. His scientific career proceeded to a Fellowship in P...
Continuing experimentation led Millikan to his first important discovery of the elementary charge of electricity through use of his elegant "falling drop method", measuring the constant charge and quanta of electrons, the direct determination of Planck's Constant, confirmation of the atomic theory of matter, and experiments in spectroscopy beyond u...
Millikan took many administrative and leadership responsibilities in science: with the National Research Council organized by George Hale during World War I, the American Association for the Advancement of Science, and the American Physical Society. He represented the United States at the League of Nations and the International Congress of Physics ...
In 1921, persuaded by George Hale and Arthur Noyes, Millikan moved from Chicago to the newly-established California Institute of Technology in Pasadena and the Directorship of its Norman Bridge Physics Laboratory. At Caltech, his research centered on "cosmic rays," a term he invented to describe high energy particles that strike the Earth's atmosph...
This eminent scientist with a clergyman father, an education in the Classics, and a career in science devoted much effort to reconciling his religious and scientific philosophies and wrote and lectured widely on this topic. Robert Millikan died on December 19, 1953, in San Marino, California, within a few weeks of his wife's death.
Robert Millikan's accomplishments were the design and fine-tuning of experiments which unambiguously confirmed the most important scientific theories of his time, providing the implications for atomic theory. His oil drop experiment confirmed the existence of the electron and accurately determined its charge. His experiment on the photoelectric eff...
Millikan's requirements in designing his elegant and ingenious oil drop method were: (1) The creation of the smallest possible, completely spherical, homogenous body. This body must have a constant mass in the absence of interfering gravitational force and convection currents. (2) The application of an electric field to put a charge on the sphere, ...
Among the sources used to change the drop's charge were: alpha, beta, or gamma ray bombardment from radium, ultraviolet illumination, and X-ray irradiation—the full gamut of the electromagnetic spectrum. The experimental facts determined were: there is a charge on an electron, there is a smallest "unit" charge, and the charge changes in discrete am...
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How did Robert Millikan contribute to atomic theory?
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Feb 13, 2024 · He was pivotal in confirming that cosmic rays are high-energy particles, mainly protons and atomic nuclei. Contributions to Quantum Theory. Through his experimental evidence supporting quantum theory, Millikan helped Niels Bohr’s quantum theory of the atom to gain acceptance.
PDF. Download PDF. Dr. Robert Millikan was an American physicist who received the Nobel Prize in Physics in 1923 for his work the photoelectric effect and for measuring the elementary electronic charge.
His earliest major success was the accurate determination of the charge carried by an electron, using the elegant “falling-drop method”; he also proved that this quantity was a constant for all electrons (1910), thus demonstrating the atomic structure of electricity.
Sep 26, 2023 · 6 Altmetric. Metrics. One hundred years ago, the Nobel Prize in Physics was awarded to Robert Millikan for his work on the elementary charge of electricity and on the photoelectric effect ...
Jan 20, 2012 · Millikan reported a value for the fundamental electric charge that was within half a percent of today’s accepted value. The experiment helped earn Millikan a Nobel prize in 1923 but has been a source of some controversy over the years. J. J. Thomson discovered the electron in 1897 when he measured the charge-to-mass ratio for electrons in a beam.
