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.
Solar flares are giant eruptions of electromagnetic radiation, including X-rays and ultraviolet light, which launch into space off the sun's surface, according to NASA. Emily Mae Czachor, CBS News, 4 June 2026 This includes the disappearance of the outer boundary that defines what a black hole is, the light or electromagnetic radiation trapping region known as the event horizon. Robert Lea, Space.com, 3 June 2026 How do the electromagnetic radiation bursts known as flares decide to erupt? Quanta Magazine, 28 May 2026 Our visible spectrum, the segment of electromagnetic radiation that humans can detect, is incredibly narrow. Scott Travers, Forbes.com, 23 May 2026 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 9 Jun. 2026.

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

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