• Recently, the Prime Minister greeted India’s scientific community on the occasion of National Science Day (28th February).
  • National Science Day (NSD) is celebrated annually on 28th February to commemorate the discovery of the Raman Effect by Nobel laureate and Physicist CV Raman on this day in 1928.
  • In 1986, the National Council for Science & Technology asked the Government of India to designate 28th February as NSD.
  • Since 1987, the event has been celebrated all over the country in schools, colleges, universities and other academic, scientific, technical, medical and research.
  • The day aims to propagate the message of the importance of science and its application among the people.
  • The purpose of celebrating this day is to enhance scientific temper, popularisation of science and encourage innovative activities by infusing scientific temperament in the masses and to create a positive scientific research culture.
  • The Nodal Agency to support celebration of NSD is the National Council for Science & Technology Communication (NCSTC) of the Ministry of Science and Technology.
  • Theme 2022: “Integrated Approach in science and technology for Sustainable Future”.

The theme focuses on a four-fold integrated approach for a sustainable future which are

  1. Extended scientific intervention encompassing engineering
  2. Medical and other institutions.
  3. Extra scientific integration involves identification of the needs of other ministries like Jal Shakti, Railways, among others.
  4. Extended science driven all inclusive approach integrating startups and industry.

CV Raman

  • ChandrashekharaVenkata Raman was a physicist from Tamil Nadu.
  • His work in the field of light scattering earned him the Nobel Prize for Physics in 1930.
  • This phenomenon was named the Raman effect.
  • In 1954, he was honoured with India’s highest civilian award, the Bharat Ratna

Raman Effect

  • Raman 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.
  • In simpler words, it is a change in the wavelength of light that occurs when a light beam is deflected by molecules.
  • When a beam of light traverses 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 is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light and its presence is a result of the Raman Effect.
  • The Raman effect forms the basis for Raman spectroscopy which is used by chemists and physicists to gain information about materials.
  • Spectroscopy is the study of the interaction between matter and electromagnetic radiation.


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