National Science Day is celebrated annually on February 28 to commemorate the discovery of the “Raman Effect”. Nobel laureate and scientist CV Raman announced the discovery of the historic Raman effect on this date in 1928.
It was for this discovery that he won the Nobel Prize in Physics in 1930.
The day is celebrated to inspire and encourage young people to develop their interest in science. Today, students present science projects across the country.
The Government of India congratulates scientists who have contributed in the field of science to mark the anniversary of ‘Raman Effect’.
The Raman effect or Raman scattering describes how the wavelength of light scatters when it is deflected onto a particular object.
It was discovered by Raman at the laboratory of the Indian Association for the Cultivation of Science in Kolkata.
He first observed the formula during his trip to Europe in 1921. He wanted to understand the phenomenon that led to the blue color of the Mediterranean Sea and icebergs.
He began experimenting with transparent blocks of ice and light from a mercury arc lamp. He recorded the change in wavelength after shining the light through ice cubes.
Russian physicists Grigory Landsberg and Leonid Mandelstam first observed the effect just a week before Raman. However, they released their results months after Raman. Therefore, Raman was the first to publish the discovery.
The theme for this year’s National Science Day is “An Integrated Approach to Science and Technology for a Sustainable Future”.
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