National Science Day Rashtriya Vigyan Diwas is celebrated in India on February 28 each year to mark the discovery of the Raman effect by Indian physicist Sir Chandrasekhara Venkata Raman on 28 February 1928.
For his discovery, Raman was awarded the Nobel Prize in Physics in 1930.
Raman Effect
Raman effect or Raman scattering is popularly known as an inelastic scattering of a photon. When light is scattered from an atom or molecule, most photons are elastically scattered with almost the same energy (frequency) and wavelength as the incident photons. But a small fraction of the photons is scattered by excitation. The frequency of scattered photons is lower than the frequency of the incident photons.
For his discovery, Raman was awarded the Nobel Prize in Physics in 1930.
Raman Effect
Raman effect or Raman scattering is popularly known as an inelastic scattering of a photon. When light is scattered from an atom or molecule, most photons are elastically scattered with almost the same energy (frequency) and wavelength as the incident photons. But a small fraction of the photons is scattered by excitation. The frequency of scattered photons is lower than the frequency of the incident photons.
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