In 1909 Robert Millikan was the first to find the charge of an electron in his now-famous oil-drop experiment. In that experiment tiny oil drops were sprayed into a uniform electric field between a ho?

Robert Millikan's oil-drop experiment involved suspending tiny oil droplets in a uniform electric field and measuring their motion to determine the charge of an electron. By balancing gravitational and electric forces on the oil droplets, he was able to calculate the charge of a single electron to be approximately 1.6 x 10^-19 coulombs. This groundbreaking experiment provided valuable insights into the fundamental properties of electrons.