What is Raman effect and what are the characteristics of Raman lines? Explain Raman Effect qualitatively by the quantum theory of light.
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C.V. RAMAN is the great Indian scientist.
He got NOBEL PRIZE on the study of Raman effect.
Raman scattering or the Raman effect is the inelastic scattering of aphoton by molecules which are excited to higher vibrational or rotational energy levels. It was discovered by C. V. Ramanand K. S. Krishnan (who was a student of C.V. Raman) in liquids, and independently by Grigory Landsbergand Leonid Mandelstam in crystals.The effect had been predicted theoretically by Adolf Smekal in 1923.
When photons are scattered from anatom or molecule, most photons areelastically scattered (Rayleigh scattering), such that the scattered photons have the same energy (frequency and wavelength) as the incident photons. A small fraction of the scattered photons (approximately 1 in 10 million) are scattered inelastically by an excitation, with the scattered photons having a frequency and energy different from, and usually lower than, those of the incident photons. In a gas, Raman scattering can occur with a change in energy of a molecule due to a transition to another (usually higher)energy level. Chemists are primarily concerned with this "transitional" Raman effect.
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C.V. RAMAN is the great Indian scientist.
He got NOBEL PRIZE on the study of Raman effect.
Raman scattering or the Raman effect is the inelastic scattering of aphoton by molecules which are excited to higher vibrational or rotational energy levels. It was discovered by C. V. Ramanand K. S. Krishnan (who was a student of C.V. Raman) in liquids, and independently by Grigory Landsbergand Leonid Mandelstam in crystals.The effect had been predicted theoretically by Adolf Smekal in 1923.
When photons are scattered from anatom or molecule, most photons areelastically scattered (Rayleigh scattering), such that the scattered photons have the same energy (frequency and wavelength) as the incident photons. A small fraction of the scattered photons (approximately 1 in 10 million) are scattered inelastically by an excitation, with the scattered photons having a frequency and energy different from, and usually lower than, those of the incident photons. In a gas, Raman scattering can occur with a change in energy of a molecule due to a transition to another (usually higher)energy level. Chemists are primarily concerned with this "transitional" Raman effect.
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It is a phenomenon in which change in the wavelength of light occurs when a beam of light is deflected by molecules. When a beam of light travels from a dust-free transparent sample of a chemical compound, then a small fraction of the light emerges in the direction other than that of the incident light. Most of the scattered light wavelength is unchanged and in small part, if the wavelength is different from that of incident light it is due to Raman Effect.
Awards which were won by CV Raman are:
Fellow of the Royal Society (1924), Knight Bachelor (1929), Nobel Prize in Physics (1930), Bharat Ratna (1954), Lenin Peace Prize (1957) and Fellow of the Royal Society (1924).
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