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Raman effect

[rah-muh n]
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noun Optics.
  1. the change in wavelength of light scattered while passing through a transparent medium, the collection of new wavelengths (Raman spectrum) being characteristic of the scattering medium and differing from the fluorescent spectrum in being much less intense and in being unrelated to an absorption band of the medium.
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Origin of Raman effect

First recorded in 1925–30; named after Sir C. Raman
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for raman effect

Raman effect

noun
  1. a change in wavelength of light that is scattered by electrons within a material. The effect is used in Raman spectroscopy for studying molecules
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Word Origin

C20: named after Sir Chandrasekhara Raman (1888–1970), Indian physicist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

raman effect in Science

Raman effect

  1. The alteration of the frequency and the phase of light as it passes through a transparent medium. The Raman effect is caused by small differences between the energy of photons absorbed by the molecules that make up the medium and the energy of photons re-emitted.
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