Emory Leon Chaffee (April 15, 1885 – March 8, 1975) was an American physicist.

Afterward he made further studies at the Harvard University and took his master's degree and his Ph.D.

He was made an instructor in electrical engineering in 1911 and got a position as assistant professor of physics in 1917.

Chaffee became chairman of the Department of Engineering Sciences and Applied Physics from 1949 till 1952.

In 1911, he invented the concept of the Chaffee Gap which was a way of producing continuous oscillations for radio transmissions, and in 1924, he started to work on controlling weather, using aircraft to break up clouds with electrically charged grains of sands.