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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...
The American scientist Robert Millikan (1868–1953) carried out a series of experiments using electrically charged oil droplets, which allowed him to calculate the charge on a single electron. Millikan created microscopic oil droplets, which could be electrically charged by friction as they formed or by using X-rays.
- 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...
Along with his work on the photoelectric effect, the feat garnered him the Nobel Prize in Physics in 1923. Interestingly, Millikan’s research achievements promoted the general acceptance of both Niels Bohr's quantum theory of the atom and Albert Einstein’s photoelectric equation, an important step precipitating their recognition by the ...
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Sep 26, 2023 · Ankita Anirban. Nature Reviews Physics 5 , 553 ( 2023) Cite this article. 667 Accesses. 6 Altmetric. Metrics. One hundred years ago, the Nobel Prize in Physics was awarded to Robert Millikan...
Aug 13, 2023 · Outline milestones in the development of modern atomic theory. Summarize and interpret the results of the experiments of Thomson, Millikan, and Rutherford. Describe the three subatomic particles that compose atoms. Define isotopes and give examples for several elements. If matter is composed of atoms, what are atoms composed of?
Millikan, in spite of the fact that Pupin—to Robert's horror—took no stock in the atomic theory of matter. Following the receipt of his doctor's degree in 1895 Millikan de-cided on Pupin's insistence—"and since a satisfactory job did not appear"—to study in Germany. It was a fortunate time to be study-
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