The correct answer is Chandrasekhara Venkata Raman.
India's first physicist to win a NobelPhysics Prize in 1930, for his work on the scattering of light.
The discovery of the effect was named after him (Raman Effect).
He further established that a small portion of the scattered light acquires other wavelengths than that of the original light because some of the incoming photons' energy can be transferred to a molecule, giving it a higher level of energy.