February 28: National Science Day
The National Science Day (NSD) i.e. Rashtriya Vigyan Diwas (राष्ट्रीय विज्ञान दिवस) is celebrated every year on February 28 in India. The 2017 theme is “Science and Technology for Specially Abled Persons”.
This day marks the epoch-making discovery of Raman Effect by Indian physicist Chandrasekhara Venkata Raman (CV Raman) on February 28, 1928. This discovery was awarded with the Nobel Prize in Physics in 1930.
This day is celebrated as science festival in the entire nation by organising science exhibitions, seminars, workshops, symposiums and many other activities.
The National Science Day was instituted by the Union Government in 1986 based on the demand of National Council for Science and Technology Communication (NCSTC) forwarded. The first National Science Day was celebrated on 28 February 1987.
What is Raman Effect?
Some part of light beam after passing through a transparent medium gets scattered. This phenomenon of scattering of light is termed as Raman Scattering and the cause of scattering is called the Raman Effect. The wavelength of these scattered rays is different from that of the incident rays of light.
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