CV Raman Current Affairs

128th birth anniversary of CV Raman observed

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.

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28 February: National Science Day

In India February 28 is celebrated as the National Science Day i.e. Rashtriya Vigyan Diwas (राष्ट्रीय विज्ञान दिवस) every year.

Significance of Day: It aims to impart scientific temper in the minds of people of all age groups.

The theme for year 2016 is “Scientific Issues for Development of the Nationthat aims at raising public appreciation.

This day is celebrated as science festival in the entire nation by organising science exhibitions, seminars, workshops, symposiums and many other activities.

Why National Science Day is celebrated?

  • This day marks the epoch-making discovery of Raman Effect by Indian physicist Chandrasekhara Venkata Raman (CV Raman) on February 28, 1928.
  • This discovery was awarded with the Nobel Prize in Physics in 1930.
  • In 2013, the American Chemical Society designated the ‘Raman Effect’ as an International Historic Chemical Landmark.

Background

In 1986, National Council for Science and Technology Communication (NCSTC) had demanded Union Government to assign February 28 as the ‘National Science Day’ for India. The first National Science Day was celebrated on February 28, 2000.

The 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.

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