- For the starship-mounted projectile weapon, see Photon torpedo
A photon is an elementary particle, classed as a boson. In physics interactions, it is responsible for the electromagnetic force. When emmitted, photons of different energies are responsible for gamma radiation, X-rays, ultraviolet radiation, visible light, infra-red light and radio waves.
The holographic technology maintained by the Xyrillians utilized resequenced photons. (ENT: "Unexpected")
In 2373, the USS Voyager used three photon bursts to simulate the appearance of three new stars above Takar, as per a passage in the "Song of the Sages". This facilitated the removal of the Ferengi Arridor and Kol from power in a manner consistent with Takarian mythology. (VOY: "False Profits")