Photon

Photon


Like all elementary particles, photons are currently best explained by quantum mechanics and exhibit wave-particle duality, exhibiting properties of both waves and particles. For example, a single photon may be refracted by a lens and exhibit wave interference with itself, and it can behave as a particle with definite and finite measurable position or momentum, through not both at the same time as per Heisenberg's uncertanity principle.

 Photons do  not experience the electromagnetic force themselves, and so they do not interact with each other, but the effects of electromagnetism are produced by the energy and momentum they carry. The photons that carry force are known as 'virtual' particles

 The main things about photon is that, its invariant mass is zero, it always moves at the speed of light in a vacuum.

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