Chandrasekhara Venkata Raman (/ˈrɑːmən/; 7 November 1888 – 21 November 1970) was an Indian physicist who made groundbreaking works in the field of light scattering , he discovered that when light traverses a transparent material, some of the deflected light change wavelength and amplitude.
Chandrasekhara Venkata Raman was born at Tiruchirappalli in Southern India on November 7th, 1888. His father was a lecturer in mathematics and physics so that from the first he was immersed in an academic atmosphere.
C.V. Raman was awarded the 1930 Nobel Prize in Physics for his discovery of the Raman effect, in which light that passes through a material is scattered and the wavelength of the scattered light is changed because it has caused an energy state transition in the material's molecules.
Raman effect, change in the wavelength of light that occurs when a light beam is deflected by molecules. When 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.
Raman effect takes place when light enters in a molecule and interacts with the electron density of the chemical bond causing electromagnetic field in the molecule leading to vibrational and deformation of frequency shift. The incident photon excites the electron into a virtual state.
The Raman Effect is the process of scattering of light particles by molecules of a medium. The scattering occurs due to a change in the wavelength of light as it enters the medium.
Raman spectroscopy is commonly used in chemistry to provide a structural fingerprint by which molecules can be identified. The laser light interacts with molecular vibrations, phonons or other excitations in the system, resulting in the energy of the laser photons being shifted up or down.
Raman spectroscopy is used in many varied fields – in fact, any application where non-destructive, microscopic, chemical analysis and imaging is required. Whether the goal is qualitative or quantitative data, Raman analysis can provide key information easily and quickly, not interfered by water. non-destructive. highly specific like a chemical fingerprint of a material. Raman spectra are acquired quickly within seconds
Raman Spectroscopy is a non-destructive chemical analysis technique which provides detailed information about chemical structure, phase and polymorphy, crystallinity and molecular interactions. It is based upon the interaction of light with the chemical bonds within a material.
Color of sea.
At that time, scientists believed the sea was blue because it reflected the colour of the sky, but Raman found that it was the water itself that caused blue light to scatter more than other colors in light. This meant that the molecules in the liquid were changing the colour of some of the light passing through it.
Sky is blue.
Through various experiments Raman concluded that any liquid contains minute particles and because of them blue colour is scattered. Though violet has the shortest wave length, the sky looks blue, not violet. This is because, the rays penetrating through the atmosphere and reaching Earth contain mostly blue colour.
Clouds are White
Clouds are white because light from the Sun is white. As light passes through a cloud, it interacts with the water droplets, which are much bigger than the atmospheric particles that exist in the sky.
In 1954, he was awarded Bharat Ratna by the Government of India. He was also awarded
Lenin Peace Prize in 1957.
Inspirational Quotes By C V Raman
- Ask the right questions, and nature will open the doors to her secrets.
- Treat me right and you will see the light…Treat me wrong and you will be gone!!
- You can’t always choose who comes into your life but you can learn what lesson they teach you.
- Success can come to you by courageous Devotion to the task lying in front of you.
- If someone judges you,they are wasting space in their mind Best part, it’s their problem.
- I strongly believe that fundamental science cannot be driven by instructional, industrial and government or military pressures
- The whole edifice of modern physics is built up on the fundamental hypothesis of the atomic or molecular constitution of matter.
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- C .V RAMAN.
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