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Sir C.V. Raman, an eminent Indian physicist, discovered the 'Raman Effect' on February 28, 1928.
This groundbreaking work on the inelastic scattering of light earned him the Nobel Prize in Physics in 1930.
He holds the distinction of being the first Indian to receive the Nobel Prize in Physics.
His birth anniversary is November 7, 1888, in Tiruchirappalli, and his discovery is commemorated as National Science Day on February 28.
The Raman Effect describes the phenomenon where, when light traverses a transparent material, a small fraction of the scattered light changes its wavelength and amplitude. This occurs due to the inelastic scattering of photons by molecules, meaning there is an exchange of energy between the light photons and the molecular vibrations, rotations, or other excitations. This energy exchange results in the scattered light having a different frequency (and thus wavelength) than the incident light.
Simple Analogy: Imagine throwing a ball at a moving object. Most of the time, the ball bounces back with its original speed (elastic scattering). But sometimes, it might either gain or lose a tiny bit of speed if the object was moving towards or away from it (inelastic scattering). The Raman Effect is similar, where light 'bounces' off molecules and changes its energy slightly.
Celebrated annually on February 28th in India to commemorate the discovery of the Raman Effect by Sir C.V. Raman in 1928.
Sir C.V. Raman was among the first recipients of India's highest civilian award, the Bharat Ratna, in 1954, alongside C. Rajagopalachari and Sarvepalli Radhakrishnan.
This is the elastic scattering of light by particles much smaller than the wavelength of light, where the scattered light has the same wavelength as the incident light. The Raman Effect is a form of inelastic scattering, distinct from Rayleigh scattering.
GS Paper I (Modern Indian History - Personalities), GS Paper III (Science & Technology - Indian achievements in science)
General Awareness (Science & Technology, Awards, Famous Personalities)
General Awareness (Science & Technology, Awards, Important Dates)
General Science (Physics), General Awareness (Indian Personalities, Awards)
General Knowledge (Science & Technology, Awards, Famous Indians)
Consider the following statements: 1. St. Francis Xavier was one of the founding members of the Jesuit Order. 2. St. Francis Xavier died in Goa and a church is dedicated to him there. 3. The Feast of St. Francis Xavier is celebrated in Goa each year. Which of the statements given above are correct?
Answer: 1 and 3 only
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In the context of Indian history, the principle of 'Dyarchy (diarchy)' refers to
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High
The change in the wavelength of light that occurs when a light beam is deflected by molecules, due to inelastic scattering.
The process by which light is deflected from a straight path by localized non-uniformities in the medium through which it passes.
A type of scattering where the kinetic energy of an incident particle is not conserved, leading to a change in the energy (and thus wavelength/frequency) of the scattered particle.