A tribute to CV Raman on National Science Day

Today, we are privileged to pay tribute to Nobel Laureate CV Raman, who discovered that when light traverses a transparent material, some of the deflected light changes in wavelength. 

On 28th February 1928,  Chandrasekhara Venkata Raman discovered a phenomenon of scattering of photons.  In 1930, after two years,  he got the Nobel Prize for this remarkable discovery. This was the first Nobel Prize awarded to an Indian in the field of Science. To mark his contribution to the field of Science we celebrate National Science Day on this day every year.

CV Raman was working in the laboratory of the Indian Association for the Cultivation of science, Kolkata when he discovered the phenomenon which later came to be known as the ‘Raman Effect’ after his name.

The Raman Effect, also known as Raman scattering, refers to the phenomenon in spectroscopy when a change in the wavelength of light occurs when a light beam is deflected by molecules.

"If 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 (incoming) beam. Most of this scattered light is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light. The presence of this -  the change in the wavelength caused due to deflection of the molecules - was discovered by CV Raman."

Image: Google Doodle

To better understand this phenomenon and CV Raman's contribution to the field of Science, please watch the following:

1. Mars & Beyond - A documentary on the scientist CV Raman and his legacy

2. An interview with CV Raman


3. A journey through the life and work of CV Raman:

Raman's Nobel prize Some treasures from the life of great scientist CV Raman.

The Raman Effect exhibit - A closer look at the Raman effect 

4. Today, why not make the time to make your own CD Spectrometer.  Watch the video below and see how it's done. 

* Source of profile image: Caravan magazine

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