Raman Effect

Raman Effect refers to the change in the wavelength of light when a light beam gets deflected by molecules. This phenomenon is named after Indian physicist Sir Chandrasekhara Venkata Raman, who first published his observations of the effect in 1928.

Whenever a beam of light traverses a transparent, dust-free sample of a compound, a small portion of the light emerges in directions other than that of the incident beam. This scattered light has a largely unaltered wavelength, but a small part has wavelengths different from the incident light. This phenomenon takes place because of the Raman Effect.

We can understand Raman scattering more efficiently by considering the incident light to be comprised of photons that strike the molecules of the sample. The collisions between the two are primarily elastic, and the photons are subsequently scattered with unchanged frequency and energy.

However, sometimes the molecule occasionally takes up energy from or gives up energy to the photons. As a resul…