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electromagnetic radiation
noun
: energy in the form of electromagnetic waves
also
: a series of electromagnetic waves
Examples of electromagnetic radiation in a Sentence
Recent Examples on the Web
Solare flares are powerful bursts of electromagnetic radiation that travel at light speed and take only eight minutes to reach Earth, often disrupting some radio communications and satellites.
—Jamie Carter, Forbes, 4 Oct. 2024
Forecasters use a five-level scale to measure geometric storms, which are caused when coronal mass ejections release solar particles and electromagnetic radiation toward our planet.
—Eric Lagatta, USA TODAY, 10 Oct. 2024
While the first generation of Starlink satellites emits radio waves that can hinder astronomical observations, say the researchers, the new ‘V2-mini’ Starlink satellites emit far more unintended electromagnetic radiation (UEMR).
—Jamie Carter, Forbes, 4 Oct. 2024
Returning to physics basics, photons are tiny packets of light representing the entire spectrum of electromagnetic radiation.
—New Atlas, 26 Sep. 2024
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Word History
First Known Use
1891, in the meaning defined above
Time Traveler
The first known use of electromagnetic radiation was
in 1891
Dictionary Entries Near electromagnetic radiation
Cite this Entry
“Electromagnetic radiation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electromagnetic%20radiation. Accessed 22 Nov. 2024.
Kids Definition
electromagnetic radiation
noun
: energy in the form of electromagnetic waves
also
: a series of electromagnetic waves
Medical Definition
electromagnetic radiation
noun
: a series of electromagnetic waves
More from Merriam-Webster on electromagnetic radiation
Britannica.com: Encyclopedia article about electromagnetic radiation
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