When is the National Science Day celebrated to commemorate the contribution of CV Raman?

28 February

The correct answer is Option (4) - 28 February

National Science Day is celebrated on 28^th February every year to commemorate the discovery of the Raman Effect by Sir Chandrasekhara Venkata Raman (C.V. Raman) in 1928. The Raman Effect is a phenomenon in spectroscopy where light scattered by molecules contains spectral lines different from the incident light, providing valuable information about the molecular structure.

By discovering this effect, C.V. Raman became the first Asian to win the Nobel Prize in Physics in 1930, making India proud. National Science Day is celebrated across India to honor his contributions to science and to promote scientific temper and knowledge among the masses. It serves as a reminder of the importance of scientific research and innovation in addressing societal challenges and driving progress. Various events, seminars, workshops, and exhibitions are organized on this day to showcase advancements in science and inspire the younger generation to pursue careers in science and technology.