virtual photon

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virtual photon

physics

Also known as: virtual particle

Learn about this topic in these articles:

quantum electrodynamics

In quantum electrodynamics
These photons are “virtual”; that is, they cannot be seen or detected in any way because their existence violates the conservation of energy and momentum. The photon exchange is merely the “force” of the interaction, because interacting particles change their speed and direction of travel as they release…
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subatomic particles

In subatomic particle: Electromagnetism
…borrowed photons are called “virtual” photons to distinguish them from real photons, which constitute electromagnetic radiation and can, in principle, exist forever. This concept of virtual particles in processes that fulfill the conditions of the uncertainty principle applies to the exchange of other gauge bosons as well.
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