Introduction:

Rashtriya Vigyan Evam Prodoyogiki Sanchar Parishad (RVPSP) (National Council for Science & Technology Communication) of the Ministry of Science and Technology celebrates National Science day (NSD) to popularise the benefits of scientific knowledge and pratical appropriation.

Various activities are organized on the day like debates, quiz competitions, exhibitions, lectures, etc., in which college students, school students and teachers too participate.

Every year a different theme is selected and all the forth programmes and activities are based around that theme.

The day is celebrated to honour Nobel laureate Sir C.V. Raman for his invention of the ‘Raman effect’ on 28th February 1928.

Whole nation takes the honour of thanking all the scientists for their remarkable contributions and dedication on this occasion.

The day attracts many young minds and motivates to take up science as their career.

The celebrations of this day include showcasing the country’s competence in the field of science.

Science has played very important role in transforming society. The events on this day reminds the importance of science; thus inspire people of all ages to work in the field of science, engineering and technology.

Sir C. V. Raman was honoured with the first prestigious Nobel Award in Physics for the country in 1930. Hence the National Science Day holds great significance for Indian Science and scientific community.

National Science Day brings an opportunity to focus on issues related to science centre stage. The activities organized on the occasion bring public face to face with the issues of great concern. People interact with the science fraternity for mutual benefit.

National Science Day is observed to spread the message of importance of science and its application among the people and to accelerate the pace of development. Science has contributed a lot towards welfare of humanity.

Raman Effect

Raman effect or Raman scattering as it is popular known as is 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.