Nationwide Science Day: Commemoration Of the RAMAN EFFECT

Yearly on 28th February, Nationwide Science Day is well known to commemorate the invention of the Raman Impact by Sir C.V. RAMAN.


The Minister of Science and Know-how, Dr Jitendra Singh unveiled the theme for Nationwide Science Day 2023 as “World Science for World Wellbeing”.


Sir Chandrasekhara Venkata Raman was an Indian physicist and the primary recipient of Bharat Ratna in 1954.

He was born to Tamil Brahman Dad and mom within the Madras Presidency on the 7th of November 1888. He was a born prodigy. On the age of 13, he accomplished Excessive Faculty and by the age of 16, he has already achieved his bachelor’s diploma in Physics too.

 He’s identified for his work within the area of sunshine scattering and the way the deflected gentle modifications its wavelength and frequency. This course of got here to be often called the Raman impact of Raman scattering.

He acquired the Nobel Prize in Physics in 1930 for this discovery and have become the primary Asian to obtain a Nobel Prize in any department of science.

He launched his first analysis paper in 1906 on the diffraction of sunshine. On the age of 19, he joined the Indian Finance Service in Calcutta. He additionally based the INDIAN JOURNAL OF PHYSICS in 1926. He additionally turned the primary Indian director of the Indian Institute of Science. In 1948, he established Raman Analysis Institute.


The scientific foundation of musical sounds fascinated him. He labored on the theories of transverse vibrations of bowed string devices. He research the sound of assorted violin devices and water splashes and this led him to carry out an experiment with mechanically performed violins.

He was the primary individual to conduct a scientific research on the sounds of desk and mridangam sounds. He performed analysis on vibrations of the pianoforte string which was often called Kaufmann’s principle.

These works in acoustics turned out to be actually useful for his later works on optics and quantum mechanics.


C.V. Raman began to analyze the phenomenon of the scattering of sunshine in 1919. He started this experiment by discovering out the explanations behind the blue coloration of seawater and this turned out to be his first phenomenal discovery within the area of physics of sunshine.

On his approach again from London, he examined the blue coloration of the Mediterranean Sea utilizing only a easy pocket-sized spectroscope and a Nicol Prism. He questioned the speculation given by Lord Rayleigh in 1910. In line with Lord Rayleigh, the blue coloration of the ocean is as a result of reflection blue from the sky and this got here to be often called Rayleigh scattering.

Afterward, in 1921 revealed an article “The Color of the Sea” questioning the idea of Rayleigh scattering.

National Science Day: Commemoration Of the RAMAN EFFECT

After discovering the character of sunshine scattering attributable to which we see the blue coloration of the water, he started to give attention to the precept behind this phenomenon.

On 28th February 1928, Raman and his new analysis affiliate obtained spectra of the modified scattering separate from the incident gentle.

The Raman impact is principally the phenomenon of change of wavelength of sunshine that happens when a beam of sunshine is deflected by molecules.

It implies that when a matter is happy by the sunshine of 1 coloration, the atoms contained in it emit gentle of two colours. Amongst these two lights one gentle is totally different from the thrilling coloration and the opposite one is of a decrease spectrum. And the altered coloration produced is totally different from the character of the substance used.

This phenomenon got here to be often called the Raman impact and was one of many earliest proofs of the quantum nature of sunshine.

His contribution to the sphere of physics launched the world to the idea of quantum physics and as a way to commemorate his contribution in direction of Indian Scientific analysis the Rajiv Gandhi authorities 1986 determined to have fun the invention day of the Raman impact as Nationwide Science Day.