National Science Day: The Raman Effect, which CV Raman won the Nobel for 

National Science Day in India

National Science Day is celebrated in India on February 28th each year to commemorate 

the discovery of the Raman Effect by Indian physicist Sir Chandrasekhara Venkata Raman in 1928. 

Sir C.V. Raman was awarded the Nobel Prize in Physics in 1930 for his groundbreaking discovery.

What is the Raman Effect?

The Raman Effect is a phenomenon in which a change in the wavelength of light occurs 

when a light beam is deflected by molecules.

When a beam of light passes through a dust-free, 

transparent sample of a chemical compound, 

a small fraction of the light emerges in directions other than that of the incident (incoming) beam. 

Most of this scattered light has an unchanged wavelength. 

A small part, however, has wavelengths different from that of the incident light; 

its presence is a result of the Raman Effect.

The Significance of the Raman Effect

The Raman Effect has a wide range of applications in various fields including:

Physics: It provides insights into the structure of molecules and the vibrational modes of crystals.

National Science Day: The Raman Effect, which CV Raman won the Nobel for