Physics:Quantum photon

From HandWiki Test
Revision as of 20:39, 19 May 2026 by Maintenance script (talk | contribs) (Rebuild particle page from reviewed Wikipedia sources)


← Back to Particles Book II

A quantum photon is the elementary quantum of the electromagnetic field. It is a massless, electrically neutral spin-1 boson carrying energy, momentum, and polarization. Photons connect the wave description of electromagnetic radiation with particle-like absorption and emission events.[1][2]

Error creating thumbnail: File missing
Complex yellow illustration of a photon as an electromagnetic wave packet with polarization structure.

Quantum description

In quantum electrodynamics, the photon is the gauge boson associated with electromagnetic interactions. A photon state can be described by frequency, momentum, helicity or polarization, and occupation number. Its energy is proportional to frequency, and in vacuum it propagates at the speed of light.[3]

Wave-particle behavior

Single-photon experiments show interference, diffraction, and discrete detection events. The photon concept is therefore not a classical particle picture but a quantum-field description whose measurements may appear localized while amplitudes propagate and interfere.

Role in physics

Photons mediate electromagnetic forces, carry information in spectroscopy and astronomy, and are central to lasers, optics, radiation processes, quantum communication, and quantum measurement.[4]


See also

Table of contents (84 articles)

Index

Full contents

References


    Author: Harold Foppele


    Source attribution: Photon

    Retrieved from "https://handwiki.scholarlywiki.org/index.php?title=Physics:Quantum_photon&oldid=3997"