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NATIONAL SCIENCE DAY CELEBRATED

NATIONAL SCIENCE DAY CELEBRATED

Context

Each year, the National Science Day is celebrated on 28 February in India.

Details

  • It is celebrated to spread the message about the importance of science in the daily life of the people.
  • Theme for 2021: Future of STI: Impact on Education Skills and Work
  • Purpose: To commemorate the discovery of the Raman effect as the Indian physicist Sir C V Raman discovered the Raman effect on 28 February 1928 and was awarded the Nobel Prize in Physics in 1930 for it.

Raman Effect

  • The Raman Effect is a phenomenon in spectroscopy discovered by the eminent physicist Sir Chandrasekhara Venkata Raman in 1928.
  • In 1930, he got a Nobel Prize for this remarkable discovery and this was the first Nobel Prize for India in the field of Science.
  • The Raman Effect 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; its presence is a result of the Raman Effect.

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