Matter Waves is a 1961 educational film produced by Educational Services, Incorporated, in collaboration with Bell Telephone Laboratories and the Physical Science Study Committee. Directed by John R. Friedman and produced by Kevin Smith, the film features physicists Alan Holden and Lester Germer. It explores the wave nature of matter, illustrating concepts such as electron diffraction and the de Broglie hypothesis. The film employs visual demonstrations, including electron diffraction patterns and optical analogs, to convey the principles of wave-particle duality and quantum mechanics.