Last Updated 09 Jul 2021

Raman Effect

Category Chemistry, Physics
Essay type Research
Words 320 (1 page)
Views 160

Raman scattering or the Raman effect is the inelastic scattering of a photon. It was discovered by Sir Chandrasekhara Venkata Raman and Kariamanickam Srinivasa Krishnan in liquids,[1] and by Grigory Landsberg and Leonid Mandelstam in crystals. When light is scattered from an atom or molecule, most photons are elastically scattered (Rayleigh scattering), such that the scattered photons have the same energy (frequency) and wavelength as the incident photons.

However, a small fraction of the scattered light (approximately 1 in 10 million photons) is scattered by an excitation, with the scattered photons having a frequency different from, and usually lower than, the frequency of the incident photons.  In a gas, Raman scattering can occur with a change in vibrational or rotational energy of a molecule (see energy level). Chemists are concerned primarily with the vibrational Raman effect

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  • Hargobind Khorana:  Indian-born American biochemist who shared the Nobel Prize in Physiology or Medicine in 1968 with Marshall W.
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He pioneered the investigation of radio and microwave optics, made very significant contributions to plant science, and laid the foundations of experimental science in the Indian subcontinent. IEEE named him one of the fathers of radio science. He is also considered the father of Bengali science fiction. He was the first person from the Indian subcontinent to receive a US patent, in 1904.

Raman Effect essay

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