jul 15, 1909 - Oil Drop Experiment: Performed by Robert A. Millikan and Harvey Fletcher; Observing tiny electrically charged droplets of oil located between two parallel metal surfaces, forming the plates of a capacitor to measure the electric charge of an electron; Offered convincing proof that electric charge exists in basic natural units
Added to timeline:
Date:
jul 15, 1909
Now
~ 116 years ago