C. V. Raman and K. S. Krishnan observed additional spectral lines in light scattered by liquids. Filtering the illumination made it possible to distinguish these new components from lines already present in the incident spectrum. In the Raman effect, exchanged energy changes the scattered photon's frequency, providing information about molecular energy levels. The experiment thus turned a faint part of scattering of light into a probe of molecular structure.[ref]
The Optical Analogue of the Compton Effect by Chandrasekhara Venkata Raman and Kariamanikkam Srinivasa Krishnan. 1928 report, filtered incident light and additional scattered spectral lines
A physicist.[ref]
https://www.nobelprize.org/prizes/physics/1930/raman/biographical/. Independent professional biography and identity
Portrait of C. V. Raman
. Unknown photographer; The Modern Review, March 1924. Commons PD-India claim for expired protection; the File requests an additional US public-domain tag. No independent worldwide-rights determination., via Wikimedia Commons. Source.- A New Type of Secondary Radiation by Chandrasekhara Venkata Raman and Kariamanikkam Srinivasa Krishnan
- Nobel Lectures, Physics 1922–1941 The Molecular Scattering of Light by Chandrasekhara Venkata Raman
- The Optical Analogue of the Compton Effect by Chandrasekhara Venkata Raman and Kariamanikkam Srinivasa Krishnan
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C. V. Raman, or Chandrasekhara Venkata Raman, was an eminent Indian physicist known for his pioneering work in the field of light scattering. He was born on November 7, 1888, in Tiruchirappalli, India, and passed away on November 21, 1970. Raman is best known for the discovery of the Raman Effect, which is the inelastic scattering of light when it passes through a medium.