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National Science Day:

GS Paper 3:

Topics Covered: Science and Technology- developments and their applications and effects in everyday life Achievements of Indians in science & technology; indigenization of technology and developing new technology.

 

Context:

28th February is celebrated as National Science Day (NSD) in India.

NSD is celebrated to commemorate discovery of the ‘Raman Effect’, which led to Sir C.V. Raman winning the Nobel Prize.

  • The first National Science Day was celebrated on February 28, 1987.

 

Theme: ‘Integrated Approach in Science and Technology for a Sustainable Future’.

What is the Raman Effect?

A phenomenon in spectroscopy discovered by the eminent physicist Sir Chandrasekhara Venkata Raman in 1928.

Raman Effect is a change in the wavelength of light that occurs when a light beam is deflected by molecules.

  1. 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.
  2. 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.

 

Sources: the Hindu.