photon

Particle of zero charge, zero rest mass, spin quantum number 1, energy $h ν$ and momentum $h ν c$ ( $h$ is the Planck constant, $ν$ the frequency of radiation and $c$ the speed of light), carrier of electromagnetic force.

Source:

Green Book, 2nd ed., p. 93

PAC, 1996, 68, 2223 (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2262

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Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.P04627.

Original PDF version: http://www.iupac.org/goldbook/P04627.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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photomultiplier tube		photon activation