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electromagnetic wave
noun
: one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays
Examples of electromagnetic wave in a Sentence
Recent Examples on the Web
The earliest modems used the same scheme, which relies on electromagnetic waves to represent digital information over an analog channel.
—Dan Goodin, Ars Technica, 23 Jan. 2025
Scientists have detected a strange space phenomenon where bursts of electromagnetic waves sound like birds chirping when converted into audio signals, according to a study.
—Shannon McDonagh, Newsweek, 22 Jan. 2025
These tools emit electromagnetic waves that travel into the soil and bounce back signals that experts use to interpret ground density, soil composition, and even empty spaces.
—Andrew Paul, Popular Science, 16 Jan. 2025
These tests may include: X-ray: This imaging test uses a form of radiation called electromagnetic waves to take pictures of structures inside the body.
—Laura Schober, Health, 16 Jan. 2025
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Word History
First Known Use
1882, in the meaning defined above
Time Traveler
The first known use of electromagnetic wave was
in 1882
Dictionary Entries Near electromagnetic wave
Cite this Entry
“Electromagnetic wave.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electromagnetic%20wave. Accessed 2 Feb. 2025.
Kids Definition
electromagnetic wave
noun
: a wave (as a radio wave, wave of visible light, or X-ray) that consists of an associated electric and magnetic effect and travels at the speed of light
Medical Definition
electromagnetic wave
noun
: one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays
More from Merriam-Webster on electromagnetic wave
Britannica.com: Encyclopedia article about electromagnetic wave
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