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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Radio galaxies are useful in this way because radio waves have long enough wavelengths to slip through cosmic gas and dust rather than being absorbed, as happens with other forms of electromagnetic radiation. Robert Lea, Space.com, 14 Nov. 2025 Furthermore, the team exposed the Josephson junction to microwave electromagnetic radiation whose frequency is close to that of Wi-Fi signals. Zhixin Wang, The Conversation, 10 Oct. 2025 Don't clutch your pearls too soon, because the electromagnetic radiation Tesla EVs emit is non-ionizing. Charles Singh, USA Today, 24 Sep. 2025 The report also wants a closer look at the effects of electromagnetic radiation, the microbiome, and the root causes of autism. Philip Elliott, Time, 10 Sep. 2025 See All Example Sentences for electromagnetic radiation

Word History

First Known Use

1891, in the meaning defined above

Time Traveler
The first known use of electromagnetic radiation was in 1891

Browse Nearby Words

Cite this Entry

“Electromagnetic radiation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electromagnetic%20radiation. Accessed 17 Nov. 2025.

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

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