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 Mather won the Nobel Prize for Physics in 2006, along with George Smoot, for his work using the Cosmic Background Explorer (COBE), a satellite that operated from 1989 to 1993, to map the electromagnetic radiation produced by the Big Bang. Joshua Rapp Learn, Discover Magazine, 12 Sep. 2023 Over the past couple of years, solar activity—as measured by the number of dark spots on the sun’s face—has been increasing, with solar outbursts such as flares of electromagnetic radiation and ejections of blobs of plasma on the rise. Meghan Bartels, Scientific American, 20 Oct. 2023 Radiation is just that: emitting electromagnetic radiation. Popular Mechanics, 4 Aug. 2023 Radio signals and electromagnetic radiation from satellites can create static that mimics signs of the cosmic phenomena astronomers are trying to study. Ramin Skibba, WIRED, 6 Oct. 2023 Quasars are galactic cores where dust and gas fall into a black hole and release brilliant flares of electromagnetic radiation. Stephanie Pappas, Scientific American, 28 Sep. 2023 Exactly What Radiation Does a Phone Emit? All phones, including iPhones, emit a category of electromagnetic radiation called RF, radio frequency. WIRED, 23 Sep. 2023 Other means include detection fields created by the searching sensors of sub hunters using visible light, extremely low-frequency radiation, and electromagnetic radiation. Kyle Mizokami, Popular Mechanics, 31 Aug. 2023 The spacecraft will learn more about the origin and development of coronal mass ejections—outbursts of plasma and magnetic field from the corona—as well as solar flares, or pulses of electromagnetic radiation that can cause radio blackouts on Earth. Will Sullivan, Smithsonian Magazine, 6 Sep. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'electromagnetic radiation.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 9 Dec. 2023.

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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