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Photons

"Photons" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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Discrete concentrations of energy, apparently massless elementary particles, that move at the speed of light. They are the unit or quantum of electromagnetic radiation. Photons are emitted when electrons move from one energy state to another. (From Hawley's Condensed Chemical Dictionary, 11th ed)


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This graph shows the total number of publications written about "Photons" by people in this website by year, and whether "Photons" was a major or minor topic of these publications.
Bar chart showing 6 publications over 6 distinct years, with a maximum of 1 publications in 2002 and 2008 and 2009 and 2011 and 2012 and 2016
To see the data from this visualization as text, click here.
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