What Did Robert Millikan Discover?
Last Updated Mar 25, 2020 2:35:03 PM ET
Robert Millikan made numerous discoveries in the fields of optics, electricity and physics. One of his most important discoveries was the determination of the charge of an electron. His calculations were instrumental in proving that electrons are fundamental, or indivisible, particles.
Millikan is also known for discovering cosmic rays, which are forms of ionizing radiation from outer space. The study of cosmic rays is essential in determining the composition and acceleration of the sun and other formations in space. Millikan was appointed to the National Research Council during World War I and made important contributions to the development of anti-submarine devices.
More From Reference

What Are the Steps of Presidential Impeachment?

What Does George Soros' Open Society Foundations Network Fund?

The History of the United States' Golden Presidential Dollars

How the COVID-19 Pandemic Has Changed Schools and Education in Lasting Ways

Fact Check: Is the COVID-19 Vaccine Safe?

How Does the 25th Amendment Work — and When Should It Be Enacted?