electromagnetic radiation 

Initialism: EM
https://doi.org/10.1351/goldbook.08242
Flow of energy through space propagated as synchronized sinusoidal waves of the electric field, E, and the magnetic field H.
Notes:
  1. Electromagnetic radiation is characterized by frequency ν, wavelength λ, and speed c, where νλ=c.
  2. The wavelength and velocity change when radiation enters a medium. In its interaction with atoms and molecules, radiation behaves like particles, called photons, with zero mass, energy hν, and momentum h/λ, where h is the Planck constant h=6.62607015×10−34 Js.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 657 [Terms] [Paper]
Citation: 'electromagnetic radiation' 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.08242 RIS BibTex EndNote
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