In spectroscopy, the
change in the wavelength of light
that occurs when light scatters inelastically (see scattering)
from atoms or molecules. It arises from radiation exciting (or de-exciting)
atoms or molecules from their initial states. The Raman effect is named
after the Indian physicist Chandrasekhar Raman,
who won a Nobel Prize in 1930 for his discovery.
|In the Raman effect, part of the original photon
energy is used to excite a resonant vibration – usually described
as a three-level event via a virtual excited state.
AND NUCLEAR PHYSICS