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Satyendra Nath Bose - Public-figure in South-andaman
Ans: Satyendra Nath Bose (/sɐθ.jin.ðrɐ nɑθ bos/ Bengali: সত্যেন্দ্র নাথ বসু) (January 1, 1894 – February 4, 1974), FRS, was a Indian physicist, specializing in mathematical physics. He is best known for his work on quantum mechanics in the early 1920s, providing the foundation for Bose-Einstein statistics and the theory of the Bose-Einstein condensate. He is honored as the namesake of the boson.
Although more than one Nobel Prize was awarded for research related to the concepts of the boson, Bose-Einstein statistics and Bose-Einstein condensate—the latest being the 2001 Nobel Prize in Physics, which was given for advancing the theory of Bose-Einstein condensates, Bose himself was never awarded the Nobel Prize. Among his other talents, Bose spoke several languages and could also play the Esraj, a musical instrument similar to a violin.
In his book, The Scientific Edge, the noted physicist Jayant Narlikar observed: "S.N.Bose’s work on particle statistics (c. 1922), which clarified the behaviour of photons (the particles of light in an enclosure) and opened the door to new ideas on statistics of Microsystems that obey the rules of quantum theory, was one of the top ten achievements of 20th century Indian science and could be considered in the Nobel Prize class."
While presenting a lecture[citation needed] at the University of Dhaka on the photoelectric effect and the ultraviolet catastrophe, Bose intended to show his students that the current theory was inadequate, because it predicted results not in accordance with experimental results. During this lecture, Bose committed an error in applying the theory, which unexpectedly gave a prediction that agreed with the experiment. (He later adapted this lecture into a short article called Planck's Law and the Hypothesis of Light Quanta.)
The error was a simple mistake—similar to arguing that flipping two fair coins will produce two heads one-third of the time—that would appear obviously wrong to anyone with a basic understanding of statistics. However, the results it predicted agreed with experiment, and Bose realized it might not be a mistake at all. He for the first time took the position that the Maxwell-Boltzmann distribution would not be true for microscopic particles where fluctuations due to Heisenberg's uncertainty principle will be significant. Thus he stressed the probability of finding particles in the phase space, each state having volume h³, and discarding the distinct position and momentum of the particles.
Physics journals refused to publish Bose's paper. It was their contention that he had presented to them a simple mistake, and Bose's findings were ignored. Discouraged, he wrote to Albert Einstein, who immediately agreed with him. His theory finally achieved respect when Einstein sent his own paper in support of Bose's to Zeitschrift für Physik, asking that they be published together. This was done in 1924. Bose had earlier translated Einstein's theory of General Relativity from German to English. It is said that Bose had taken Albert Einstein as his Guru (mentor).
The reason Bose's "mistake" produced accurate results was that since photons are indistinguishable from each other, one cannot treat any two photons having equal energy as being two distinct identifiable photons. By analogy, if in an alternate universe coins were to behave like photons and other bosons, the probability of producing two heads would indeed be one-third (tail-head = head-tail). Bose's "error" is now called Bose-Einstein statistics.
Einstein adopted the idea and extended it to atoms. This led to the prediction of the existence of phenomena which became known as Bose-Einstein condensate, a dense collection of bosons (which are particles with integer spin, named after Bose), which was proven to exist by experiment in 1995.