Science has played very important role in transforming society. The events on this day remind the importance of science; thus inspire people of all ages to work in the field of science, engineering and technology. Therefore Rashtriya Vigyan Evam Prodoyogiki Sanchar Parishad (RVPSP) (National Council for Science & Technology Communication) of the Ministry of Science and Technology celebrates National Science Day (Rashtriya Vigyan Diwas) to popularise the benefits of scientific knowledge and practical appropriation.
National Science Day is celebrated in India on February 28 each year to mark the discovery of the Raman effect by Indian physicist Sir Chandrasekhara Venkata Raman on 28 February 1928.
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Raman effect or Raman scattering is popularly known as an inelastic scattering of a photon. When light is scattered from an atom or molecule, most photons are elastically scattered with almost the same energy (frequency) and wavelength as the incident photons. But a small fraction of the photons is scattered by excitation. The frequency of scattered photons is lower than the frequency of the incident photons.
For his discovery, Raman was the first Indian scientist to be honoured with the prestigious awarded the Nobel Prize in Physics in 1930.
Every year a different theme is selected and all the forth programmes and activities are based around that theme. Various activities are organised on the day, like debates, quiz competitions, exhibitions, lectures, in which college students, school students and teachers too participate.