Sir Chandrasekhar Venkata Raman popularly knows as CV Raman was one of the most prominent scientists in India. He was awarded the Nobel Prize in Physics in 1930 for discovering the Raman Effect. The Raman effect is the inelastic scattering of a photon by molecules which are excited to higher vibrational or rotational energy levels. It is also called Raman scattering.
The Raman effect forms the basis for Raman spectroscopy which is used by chemists and physicists to gain information about materials. Every year, National Science Day is celebrated to commemorate the discovery of the ‘Raman Effect’ on February 28.
On his 50th death anniversary, let us remember the great mind and his contributions to science and this country:
- After India’s independence in 1947, CV Raman became the director of the Raman Research Institute. Earlier in 1928, Raman had also led an experiment with KS Krishnan on the scattering of light when he discovered the phenomena of light which is now called the ‘Raman effect’.
- In 1933, Raman joined the Indian Institute of Science, Bangalore, and became its first director. He also employed a monochromatic light from a mercury arc lamp which penetrated transparent material and was allowed to fall on a spectrograph to record its spectrum. Raman also detected the lines on the spectrum, which were later known as ‘Raman lines’.
- Other investigations carried out by Raman are either experimental and theoretical studies on the diffraction of light by acoustic and ultrasonic and hypersonic frequencies which were also published from 1934 to 1942, along with the effects produced by X-rays on infrared vibrations in crystals when exposed to ordinary light.
- Raman was appointed as the first National Professor by the new government of India in 1947. During the post-independence period, Raman studied the spectroscopic behaviour of crystals and approached a unique manner for the fundamental problems of crystal dynamics. After leaving IISc in 1948, he remained the director of Raman Research Institute until he died on November 21, 1970 at the age of 82.