National Science Day is celebrated to commemorate the discovery of the ‘Raman Effect’ by him.
- Raman effect: When light hits a material, it interacts with its molecules and exchanges energy. As a result, some scattered light changes wavelength and color.
- Example: Blue color of oceans (due to sunlight scattering off water molecules) and blue sky (due to sunlight scattering off air molecules).
About Chandrasekhara Venkata Raman (1888-1970)
- Birth: At Tiruchirappalli, Tamil Nadu.
- Founded: Indian Journal of Physics, Indian Academy of Sciences
Awards:
- Given Knighted (1929)
- Won Nobel Prize in Physics in 1930 (for Raman Effect)
- Awarded Bharat Ratna in 1954.
Values: Scientific rigour, Fortitude, Excellence, Curiosity, etc.