photon

https://doi.org/10.1351/goldbook.P04627
Particle of zero charge, zero rest mass, spin quantum number 1, energy h ν and momentum h νc(h is the Planck constant, ν the frequency of radiation and c the speed of light), carrier of electromagnetic force.
Sources:
Green Book, 2nd ed., p. 93 [Terms] [Book]
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2262 [Terms] [Paper]
Citation: 'photon' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.P04627 RIS BibTex EndNote
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