Sir C. V. Raman: Raman effect, spectroscopy, Information
Sir Chandrasekhara Venkata Raman
Sir C. V. Raman
Date of birth: 7 November 1888. Date of death: 21 November 1970.
Life:
Candrasekhara Venkata Raman was born at Tiruchirappalli in Southern India on November 7th, 1888.
He entered in Presidency College, Madras, in 1902
He passed his B.A. examination in 1904
He did this work at the Indian Association for the Cultivation of Science (IACS).
For 10 years Raman worked as a civil servant in the Indian Finance Department in Calcutta (now Kolkata), rising quickly to a senior position.
In his free time he carried out research into the physics of stringed instruments and drums.
He was the uncle of Subrahmanyan Chandrasekhar, who won the 1983 Nobel Prize for Physics.
In 1926, he established the Indian Journal of Physics as was its first editor.
In 1928, he discovered the evidence of the quantum nature of light, which came to be known as Raman Effect.
In 1932, Raman, along with Suri Bhagavantam, discovered the quantum photon spin.
Raman also worked on the acoustics of musical instruments and was also the first to investigate the harmonic nature of the sounds of Indian drums.
Raman spectroscopy:
Raman Discovers that the Sea Scatters Light
He used these to study the sky and the sea and concluded that the sea was scattering light.
Hence when Rayleigh said the sea’s color is simply a reflection of the sky’s color, he was not wholly correct. Raman reported his findings in a letter to the journal Nature.
He proceeded to demonstrate Rayleigh’s explanation to be false; he quenched the surface reflection of the sky on the sea surface, and noted that the blue color of the sea was UN attenuated.
With a diffraction grating, he showed that the maximum spectral intensity was different for the blue sky and the blue sea.
Raman sent two papers to the journal Nature positing that the color of the sea was due to light scattering by the water molecules. This phenomenon he called molecular diffraction.
Later it would be called the Raman Effect.
Which strongly depends on the frequency of the incident light After his first publication of the Raman spectra in the March 16, 1928, Indian Journal of Physics.
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