CV Raman Current Affairs - 2019
Category Wise PDF Compilations available at This Link
The National Science Day is observed every year on 28th February with an objective to spread message of importance of science and its application among the people. The theme for National Science Day 2018 is “Science and Technology for a sustainable future.”
Significance of Day
The day is observed to mark the discovery of Raman effect by Physicist CV Raman on 28th February, 1928. For his discovery, CV Raman was awarded the Nobel Prize in Physics in 1930.
The National Science Day was instituted by Central Government in 1986 based on the demand of National Council for Science and Technology Communication. The first National Science Day was celebrated on 28 February 1987.
It is celebrated to spread message about importance of science used in daily life of people and popularise science and technology. It also gives an opportunity to scientific-minded citizens in country to showcase their work in organized shows.
It is the inelastic scattering of a photon by molecules which are excited to higher vibrational or rotational energy levels. In this phenomenon, some part of light beam after passing through 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.
The 128th birth anniversary of Nobel laureate Bharat Ratna Sir CV Raman was observed on November 7, 2016.
Various functions including debates have been organized in schools and colleges across India to commemorate the day.
About CV Raman
- Chandrasekhara Venkata Raman was born on November 7, 1888 at Thiruvanaikaval in Tiruchirapalli, Tamil Nadu. He died on 21 November 1970 (aged 82) in Bangalore.
- He had discovered Raman Effect, a scientific phenomenon of scattering of light which makes the sea and clear sky look blue.
- He had discovered that when light traverses a transparent material, some of the deflected light changes in wavelength.
- Awards and Honours: His discovery of Raman Effect had earned him the 1930 Nobel Prize for Physics. In 1954, he was honoured him with India’s highest civilian award Bharat Ratna.
- He was the first recipient of the Bharat Ratna along with politician C. Rajagopalachari, philosopher Sarvepalli Radhakrishnan.
- National Science Day is observed every year in India on February to mark the discovery of Raman Effect.
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.