GS Paper - 1 (Personality)

Each year, 28 February is celebrated as National Science Day to commemorate the discovery of the ‘Raman Effect’ by Indian physicist CV Raman. This year, the theme of the celebrations is ‘Integrated Approach in Science and Technology for Sustainable Future’.


  1. The day is celebrated to encourage youth to understand the aspects of science and develop an interest in it.  The goal is to explain the importance of science among people.
  2. In 1986, The National Council for Science and Technology Communication (NCSTC) requested the Center to designate 28 February as National Science Day.
  3. The day was first celebrated on 28 February 1987.  On this day, scientist Chandrasekhara Venkata Raman discovered the Raman Effect.
  4. Raman won the Nobel Prize in 1930 for his work on ‘The scattering of light and the discovery of the Raman effect’.

What is the Raman Effect?

  1. Raman Effect is a spectroscopy phenomenon discovered by CV Raman when he was working in the Laboratory of Indian Association for the Cultivation of Science, Kolkata.
  2. He observed the phenomena in 1921 when he noticed the blue colour of the Mediterranean Sea and icebergs. He performed various experiments and was the first one to publish the observations in 1928.
  3. Raman Effect explains the change in the wavelength of light that occurs when a light beam is deflected by molecules.