Source: wikibot/kapitsa-dirac-effect
= Kapitsa–Dirac effect
{wiki=Kapitsa–Dirac_effect}
The Kapitsa–Dirac effect is a quantum phenomenon that occurs when a beam of particles, such as electrons, interacts with a periodic potential in a way that results in the diffraction of the particles into discrete energy states. This effect was first predicted by physicists Peter Kapitsa and Paul Dirac in the 1930s.