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Raman spectroscopy (/ ˈrɑːmən /) (named after physicist C. V. Raman) is a spectroscopic technique typically used to determine vibrational modes of molecules, although rotational and other low-frequency modes of systems may also be observed. [ 1 ] Raman spectroscopy is commonly used in chemistry to provide a structural fingerprint by which ...
C. V. Raman. In this Indian name, the name Chandrasekhara is a patronymic, and the person should be referred to by the given name, Venkata Raman, or just Raman. Sir Chandrasekhara Venkata Raman FRS (/ ˈrɑːmən /; [ 1 ] 7 November 1888 – 21 November 1970) was an Indian physicist known for his work in the field of light scattering. [ 2 ...
The inverse Raman effect is a form of Raman scattering first noted by W. J. Jones and Boris P. Stoicheff. In some circumstances, Stokes scattering can exceed anti-Stokes scattering; in these cases the continuum (on leaving the material) is observed to have an absorption line (a dip in intensity) at ν L +ν M .
In his first report to Nature, titled "A New Type of Secondary Radiation," Raman indicated that approximately 60 different liquids had been studied, and all showed the same result — some scattered light had a different color than the incident light. "It is thus," Raman said, "a phenomenon whose universal nature has to be recognized."
Aug 9, 2024 · Raman effect, change in the wavelength of light that occurs when a light beam is deflected by molecules. The phenomenon is named for Indian physicist Sir Chandrasekhara Venkata Raman, who first published observations of the effect in 1928. Learn more about the Raman effect in this article.
- The Editors of Encyclopaedia Britannica
Jan 30, 2023 · Raman: Theory. Page ID. The phenomenon of Raman scattering of light was first postulated by Smekai in 1923 and first observed experimentally in 1928 by Raman and Krishnan. Raman scattering is most easily seen as the change in frequency for a small percentage of the intensity in a monochromatic beam as the result of coupling between the incident ...
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Mar 2, 2018 · The helically formed mercury-discharge lamp surrounded the liquid sample cells while the Raman scattered light was observed along the axis of the liquid tube cell (Fig. 1.18b). The Steinheil spectrograph with recorder adapter was a powerful three-prism device that became the first photoelectric recorder of Raman spectra (Fig. 1.19). In the ...
