Rayleigh scattering

noun

Ray·​leigh scattering ˈrā-lē- How to pronounce Rayleigh scattering (audio)
: scattering of light by particles small enough to render the effect selective so that different colors are deflected through different angles

Examples of Rayleigh scattering in a Sentence

Recent Examples on the Web
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The phenomenon is called Rayleigh scattering and is named after Lord Rayleigh (John William Strutt), a British physicist, who wrote a paper about it in 1871. Jamie Carter, Forbes.com, 29 May 2026 During a process called Rayleigh scattering, shorter blue wavelengths scatter, causing the moon to appear orange or reddish. Olivia McIntosh, Martha Stewart, 27 May 2026 This happens because its light passes through more of Earth's atmosphere, which scatters away the shorter blue wavelengths and lets the longer red tones pass through, an effect known as Rayleigh scattering. Anthony Wood, Space.com, 9 Apr. 2026

Word History

Etymology

John W. S. Rayleigh

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of Rayleigh scattering was in 1925

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Cite this Entry

“Rayleigh scattering.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Rayleigh%20scattering. Accessed 5 Jul. 2026.

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