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fotóny
Record number d017785 Date 06.06.2025 Type M - MESH Topical term fotóny UDC G01.249.705G01.358.500.505.650.782G01.590.540.782G01.750.250.650.782G01.750.770.578.782 Note 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) 
subject heading
Number of the records: 1