emission and absorption

"It is necessary to point out that according to up-to-date physical concepts, virtual particles appear not only in vacuum. They are also created by ordinary particles. Electrons, for instance, continually emit and immediately absorb virtual photons at such a high rate that the gain in energy during the short lifetime of such a photon cannot, in principle, be observed.

"And what is more, any interaction between elementary particles can be dealt with as including the emission and absorption of virtual particles, as an exchange of them." [Something Called Nothing]

See Also

Law of Assimilation

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