In the Physical the Photon is that particle of light that propagates in a vacuum. The photon is the particle responsible for the quantum manifestations of the electromagnetic phenomenon, because it is the carrier of all those forms of electromagnetic radiation, among which are included. gamma rays, x-rays, ultraviolet light, infrared light, radio waves, microwaves, among other.
By presenting an invariant mass, the photon travels through a vacuum at a constant speed, while, by presenting corpuscular and wave properties, the photon will behave as a wave in phenomena such as the refraction of a lens and at the same time as a particle. , when it interacts with matter to transfer a fixed amount of energy.
Originally to the photon, Albert Einstein called him how much light, although, later it would be given the current name of photon, which derives from a Greek word that precisely means light. The change occurred in the year 1926 and physicist Gilbert Lewis he was responsible for it.
In the context of physics, the photon is used to symbolize the gamma greek letter and; most likely the use of this letter has to do with the fact that it comes from gamma rays.
On the other hand, at the request of chemistry and optical engineering, photons are symbolized by the following symbol: hv, which in turn represents the energy associated with a photon.
Among its main characteristics or physical properties are: that it has no mass as well as no electric charge and that it does not spontaneously disintegrate in a vacuum.
Photons are emitted in many natural processes such as, for example, when an electrically charged particle is accelerated for the duration of a molecular transition, or when a particle with its antiparticle is annihilated.