Raman effect

American  

[rah-muhn] / ˈrɑ mən /

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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Raman effect British  

/ ˈrɑːmən /

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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Raman effect Scientific  

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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Etymology

Origin of Raman effect

First recorded in 1925–30; named after Sir C. Raman

Example Sentences

The Raman effect, as it was called, became useful in determining fine molecular structure.

From Time Magazine Archive