A quantum of electromagnetic radiation; an elementary particle that is its own antiparticle.
The carrier particle of electromagnetic interactions
unit of brightness of light as received at the retina
quantum (smallest possible unit) of electromagnetic radiation, considered as an elementary particle with zero charge and rest mass.
In physics, the elementary particle or “package” (quantum) of energy in which light and other forms of electromagnetic radiation are emitted. The photon has both particle and wave properties; it has no charge, is considered massless but possesses momentum and energy. It is one of the gauge bosons, a particle that cannot be subdivided, and is the carrier of the electromagnetic force, one of the fundamental forces of nature.
According to quantum theory the energy of a photon is given by the formula E = hf, where h is Planck’s constant and f is the frequency of the radiation emitted. + prikaži više