Albert Einstein introduced the photon concept in 1905, but it was not broadly accepted until 1922, when Arthur Compton confirmed it by the scattering of X-rays from electrons.
Albert Einstein tutvustas footoni käsitust 1905. aastal, aga laiemalt aktsepteerimist leidis see alles 1922. aastal, kui Arthur Compton tõestas röntgenikiirte hajumist elektronidelt.