what is a Photon
Under the photon theory of light, a photon is a discrete bundle (or quantum) of electromagnetic (or light) energy. Photons are always in motion and, in a vacuum, have a constant speed of light to all observers, at the vacuum speed of light (more commonly just called the speed of light) of c = 2.998 x 108 m/s.
Channels: Particle physics
Tags: Photon
Uploaded by: buraktube ( Send Message ) on 09-11-2010.
Duration: 1m -0s
