Experimentally Raman Spectroscopy was discovered by an Indian Physicist C. V. Raman in 1928 with his collogue . Theoretically, similar Phenomenon inelastic scattering predicted by an Austrian Physicist Adolf Smekal in 1923. According to Smekal, might be dispersed in-elastically by molecules in addition to the origin wavelength, shorter and longer wavelengths would be present. They further demonstrated that the frequency shift between incoming and scattered light is caused by the difference in energy between two states of the molecules.

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Contents
Basic of Scattering
Introduction of Raman Spectra.
Principle of Raman Spectra.
Classical Theory of Raman Spectroscopy.
Quantum Theory of Raman Spectroscopy.
 Instrumentation.
Conclusion.

2. Experimentally Raman Spectroscopy was discovered by an Indian
Physicist C. V. Raman in 1928 with his collogue .
Theoretically, similar Phenomenon inelastic scattering predicted by an
Austrian Physicist Adolf Smekal in 1923.
According to Smekal, might be dispersed in-elastically by molecules in
addition to the origin wavelength, shorter and longer wavelengths would
be present. They further demonstrated that the frequency shift between
incoming and scattered light is caused by the difference in energy between
two states of the molecules.
For the discovery of Raman scattering Sir C. V. Raman was got Nobel
Prize in 1930s.
Introduction
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3. Spectroscopy that was used to study of the interaction between
radiation and matter as a function of wavelength.
Raman spectroscopy that used to observed to vibrational, rotational &
other low Raman spectroscopy is a branch of vibrational spectroscopy
and is a method used to identify the rotational, vibrational and other
low-frequency modes of matter that allows an easy interpretation and
highly sensitive structural identification of matter.
Raman spectroscopy work on a phenomenon known as Raman effect
that happens when the electric dipole of matter interacts with the light
photon.
Scattering is causes of collision between matter particles and light
photon, the shift in wavelength is directly proportional to concentration
and depends upon the chemical structure of molecular species.
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Most of the scattered light has the same wavelength as the radiation
source known as Rayleigh scattering.
Stoke Raman scattering happed due to interaction between the ground
state matter molecules, so occur far more easily and light photon
whereas the anti-stoke Raman scattering arises from interaction of
photon and excited state matter molecules.
Raman spectroscopy arises from vibrational and rotational motion of
molecules happened due to inelastic scattering that depends on nuclear
vibrations of matter particles cause a net change in polarizability.