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The oil drop experiment was performed by Robert A. Millikan and Harvey Fletcher in 1909 to measure the elementary electric charge (the charge of the electron). [ 1 ] [ 2 ] The experiment took place in the Ryerson Physical Laboratory at the University of Chicago .
Millikan's original oil-drop apparatus, circa 1909–1910 Millikan receives a check for over $40,000 for winning the Nobel Prize. Starting in 1908, while a professor at the University of Chicago, Millikan worked on an oil-drop experiment in which he measured the charge on a single electron. J. J.
Since electric force, in turn, is the product of the electric charge and the known electric field, the electric charge of the oil drop could be accurately computed. By measuring the charges of many different oil drops, it can be seen that the charges are all integer multiples of a single small charge, namely e .
The electron's charge was more carefully measured by the American physicists Robert Millikan and Harvey Fletcher in their oil-drop experiment of 1909, the results of which were published in 1911. This experiment used an electric field to prevent a charged droplet of oil from falling as a result of gravity.
His dissertation research was on methods to determine the charge of an electron. This included the oil drop experiment commonly attributed to his advisor and collaborator, Robert Andrews Millikan. Millikan took sole credit, in return for Fletcher claiming full authorship on a related result for his dissertation.
The firm's commodities analysts say Brent crude prices could drop to the low $60s per barrel by the end of 2026 if President-elect Donald Trump implements his tariff proposals, or if OPEC+ ...
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