Question

What did Millikan's experiment prove?

Answer 1

Millikan:

RA Millikan's developed a method for measuring the charge on electrons called the oil drop experiment.

Millikan's experiment:

1. Using the experiment, he determined the charge of the electron be $-1.602176\times {10}^{-19}\mathrm{C}$.
2. Oil droplet mass was measured by Millikan oil-drop method.
3. According to this method, the magnitude of the electric charge (q) on the droplets is equal to the integral multiple of the electrical charge (e): $\mathrm{q}=\mathrm{ne}$, where $\mathrm{n}\mathrm{is}1,2,,3,.......$.
4. In measuring the electrical charge, the forces on the oil droplets are gravitational, electrostatic, and viscous.