Mass spectrometric experiment
Oil-drop experiment
Scattering Ξ± - particles
Discharge-tube experiment
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The experiment that led to the measurement of the charge on an electron was the Oil-drop experiment, which was carried out by American physicist Robert A. Millikan in 1909. In this experiment, tiny oil droplets were suspended in a chamber filled with air between two electrically charged plates. By measuring the electric field required to suspend the droplets, as well as the force required to overcome gravity and maintain their suspension, Millikan was able to calculate the charge on each oil droplet.
By analyzing the data collected from the experiment, Millikan determined that the charge on each oil droplet was always a multiple of a certain fundamental unit of charge, which he identified as the charge on a single electron. This experimental observation led to the first accurate measurement of the charge on an electron, as well as the development of important theories about the structure of atoms and the behavior of subatomic particles.
the oil drop experiment is not correct rather it was discovered when alpha particles were emitted from the disintegration of uranium
