National Science Day 2021
- National Science Day is celebrated every year on 28thThe first National Science Day was celebrated in the year 1987. The purpose of this day is to spread the message of the importance and application of science in human life.
- It is to be known that National Science Day is celebrated every year on 28th February, in memory of the discovery of ‘Raman effect’ by Sir Chandrasekhara Venkata Raman.
- Venkata Raman was also awarded the Nobel Prize in the year 1930 for his work.
- The theme of National Science Day 2021 is “Future of STI: Impacts on Education, Skills, and Work”.
Sir Chandrasekhara Venkata Raman
- CV Raman was born on November 7, 1888, in Tamil Nadu. He did his bachelors and masters in physics from the Presidency College, Madras.
- In the field of science, he made many scientific discoveries besides the Raman Effect. He was also awarded the highest civilian award in 1954.
- This year’s theme of National Science Day 2021 is “The Future of STIs: Impact on Education, Skills and Work”. This theme has been chosen this time with the aim of increasing public acclaim.
- It is organized every year by The National Council for Science and Technology Communication (NCSTC) of the Ministry of Science and Technology.
- On this occasion, the National S&T Communication Awards, Augmenting Writing Skills for Articulating Research (AWSAR) Awards, SERB Woman Excellence Awards and, Rajendra Prabhu Memorial Appreciation Shield for outstanding work in science media and journalism were distributed.
- Ministry of science and technology released the first ever National S&T Database on S&T Awards in Indian and Indian Origin Academicians abroad at the National Science Day event.
- AWSAR is an initiative aimed at disseminating stories related to Indian research in an easy-to-understand format for the general public.
Raman Effect –
- When a colored light passes through a transparent material, it scattered. CV Raman studied this scattered light.
- The Raman Effect is when the change in the energy of the light is affected by the vibrations of the molecule or material under observation, leading to a change in its wavelength.
- It notes that the Raman Effect is “very weak”- this is because when the object in question is small (smaller than a few nano-meters), the light will pass through it undisturbed.
- When a beam of light traverses a dust-free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident beam. Most of this scattered light is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light; its presence is a result of the Raman Effect. Although scientists have been debating the question whether light is like waves or particles? But the Raman Effect proved that light is made up of small particles called photons.
Source – PIB