Robert Andrews Millikan

Robert Andrews Millikan was an American experimental physicist known for his groundbreaking work in measuring the charge of the electron and the photoelectric effect, which contributed to the understanding of quantum mechanics. He famously conducted the oil drop experiment, determining the mass of the electron, which was crucial in the development of atomic theory. Millikan's work laid foundational principles for statistical mechanics and high-energy physics by providing insights into the behavior of particles at microscopic levels and influencing later discoveries in these fields. He was awarded the Nobel Prize in Physics in 1923 for his contributions.