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National Science Day is observed on February 28 to commemorate the discovery of the Raman Effect by Indian Scientist CV Raman.

• This year’s theme of Science Day is Indigenous Technologies for Viksit Bharat. 

Remembering CV Raman 

• He was born on 7 November 1888 in Tamil Nadu. 

Contribution of CV Raman

• Raman Effect: He found this effect through light scattering research in 1928.
• Study on crystal dynamics: In 1948, He investigated spectroscopic behavior of crystals and took a novel approach to this basic issue. 
• Spin of Photons: In 1932,  Sir C.V Raman in collaboration with suri Bhagavantam identified spin of photons. 
  • This discovery enhanced scientific understanding of properties of light and its behaviour. 
• Study on X-rays on infrared vibrations: Raman sir also worked on X-rays impact on the crystals when it is exposed to light. 
• Raman Nath Theory: He gave a theoretical explanation of the diffraction phenomenon. 
  • In this explanation, he used acoustic waves of ultrasonic and hypersonic frequencies. 
  • This theory helped to understand wave interactions and crystal dynamics. 

Awards and Honors

• He received the Nobel Prize in Physics (Raman effect) in 1930.
• Received Bharat Ratna in 1954.
• In 1998, both the American Chemical Society and the Indian Association for the Cultivation of Science acknowledged Raman’s discovery as a significant International Historic Chemical Landmark.

About Raman’s Effect 

• Raman’s effect was discovered by C.V Raman in 1928
• It is a phenomenon in spectroscopy.
• Raman scattering, or the Raman effect is a state when photons interact with matter.
  • It causes a change of energy and direction of light.

News Source: AIR