Raman Effect
C.V. Raman
Sir Chandrasekhara Venkata Raman (7 November 1888 – 21 November
1970), was an Indian physicist known for his work in the field of light
scattering. When light traverses a transparent material, the deflected
light changes its wavelength. This discovery was announced on 28
February 1928, using a spectrograph developed by C. V. Raman and his
student K. S. Krishnan. This phenomenon was termed the Raman effect
or Raman scattering. In 1930, C. V. Raman received the Nobel Prize in
Physics for this discovery and was the first Asian to receive a Nobel
Prize in any branch of science.
Raman Effect
In chemistry and physics, Raman scattering or the Raman effect
is the inelastic scattering of photons by matter, meaning that
there is both an exchange of energy and a change in the light's
direction.
The different possibilities of light scattering:
·Rayleigh scattering (E=E0)
·Stokes Raman scattering (E<E0)
·Anti-Stokes Raman scattering (E>E0)
Raman Spectroscopy
Raman spectroscopy (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.
Raman spectroscopy relies upon inelastic scattering of
photons, known as Raman scattering. Raman spectroscopy is
used in chemistry to identify molecules and study chemical
bonding and intramolecular bonds.
References
Smith, E., & Dent, G. (2005). Modern Raman spectroscopy: A practical approach. John Wiley & Sons.
Raman, C. V., & Krishnan, K. S. (1928). A new type of secondary radiation. Nature, 121, 501–502.