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13/02/1912 Oil drop experiment began

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Charge of an Electron: Millikan's Oil Drop Experiment

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Millikan's Oil Drop Experiment

American physicists Robert Millikan Harvey Fletcher began their famous experiment which led to the exact knowledge of the elementary electric charge, or the charge of an electron. They measured the motions of tiny oil drops in the electric field. The elementary charge is a one of few fundamental physical constants.
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    • Essentials 

    • Background 

    • Experimental procedure 

    • Fraud allegations 

    • Millikan's experiment as an example of psychological effects in scientific methodology