Raman Effect : Raman scattering or the Raman effect ( /ˈrɑːmən/) is the inelastic scattering of a photon. It was discovered by Sir Chandrasekhara Venkata Raman and Kariamanickam Srinivasa Krishnan in liquids‚[1] and by Grigory Landsberg and Leonid Mandelstam in crystals.[2][3] When light is scattered from an atom or molecule‚ most photons are elastically scattered (Rayleigh scattering)‚ such that the scattered photons have the same energy (frequency) and wavelength as the incident photons. However
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Raman Amplifier Introduction Basic Raman Concept High Power Raman Fiber Lasers Raman Fiber Amplifier Combining EDFA and Raman Amplifier Conclusion January 8‚ 2008 Y. Lin: Raman Amplifier 1 Introduction Raman Amplifier was demonstrated in the 1980s Unavailability of high-power diode laser pump source Why do you need it : amplify signals from 1270 to 1670 nm any optical fiber can serve as the amplifying medium Raman process itself provides high-power laser Disadvantage:
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Dr. C.V. Raman was born on November 7‚ 1888 in an orthodox South Indian Brahmin family in tirchurappalli‚ Tamilnadu. His father’s name was Chandra Shekhar Aiyer who had special interest in science and mathematics. His mother Parvati was a pious lady. Raman was a very brilliant student since his early childhood He passed his matriculation at the age of 11 and at 15 graduated from the Presidency College‚ Chennai. He was the only student to get a first class. He completed his Master’s degree in Physics
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Micro-Raman Spectroscopy Raman spectroscopy is a micro-analytical method that showed many advantages in analysis of cultural heritage materials. It is a form of vibrational spectroscopy that allows the identification of particles in homogeneous materials in the micron order. The identification is employed on the basis of the molecular vibrational spectra of samples‚ obtained by excitation with visible laser light. In micro-Raman spectroscopy‚ the laser beam is focused by means of a microscope
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2.7 Raman spectroscopy Principle: Raman spectroscopy is based on the use of a laser light to induce oscillation and rotation in human fluids containing glucose. Because the emission of scattered light is influenced by molecular vibration‚ it is possible to estimate glucose concentration in human fluids [24]. This effect depends on the concentration of the glucose molecules. This technique can measure very weak signals‚ even in human fluids. The wavelength range of Raman spectrum is considered to
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RamanC. V. Raman was born at Tiruchirapalli in South India on November 7th‚ 1888. Raman entered Presidency College‚ Madras‚ in 1902‚ and in 1904 passed his B.A. examination‚ winning the first place and the gold medal in physics; in 1907 he gained his M.A. degree‚ obtaining the highest distinction. Raman spent 15 years as a Professor in Physics at Calcutta University (1917-32)‚ and 15 years as a Professor in Physics at the Indian Institute of Science‚ Bangalore (1933-48). In 1948‚ Raman became the
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| I am not a teacher but an awakener. - Robert Frost | | ------------------------------------------------- Top of Form Bottom of Form | | Quotations about Teachers and Teaching | A teacher affects eternity: he can never tell where his influence stops. Henry AdamsWhat nobler employment‚ or more valuable to the state‚ than that of the man who instructs the rising generation. Marcus Tullius CiceroThe important thing is not so much that every child should be taught‚ as that every
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Composition in Minutes Know Your Particles particle ! Source ! source ? 4 Liquid Particle Explorer: Number Size‚ Composition in Minutes Particle Characterization in the Lab method light microscopy EDX analysis IR – microscopy RAMAN microscopy meaning colour + form e.g.: black fibres elements e.g.: 96% Fe‚ 4%Cr‚.. compounds e.g.: Teflon‚ PE‚ compounds e.g.: Teflon‚ PE‚ TiO2 5 time/particle 1-5 min 60-180 min 60-180 min 60-180 min Liquid Particle Explorer: Number Size
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contains 39 questions including sub question of match the following and main questions. 1. Due to heavy traffic near the school the department of traffic police wants to install automatic traffic lights. This am be done by using the Principle of a) Raman effect b) Radiography c) Holography d) Photoelectric effect 2. Water is to be sterilized for drinking purpose without using any chemicals this can be done by using a) u v rays b) visible light c) short wave length radio waves d) long wave length Radio
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Scattering and the New Statistics”‚ which was published in the “Proceedings of the Royal Society” in 1928. Upon graduation‚ based on this paper‚ Fowler at the University of Cambridge accepted him as a research student. Being the nephew of the great C.V. Raman‚ a Nobel Prize winner in physics young Chandrasekhar’s interest in the subject came naturally to him. In 1930‚ at the age of 19‚ he completed his degree in physics from Presidency College‚ Madras (at Present Chennai) and went to England for post graduate
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