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Meghnad Saha[mAgnAd´ sA´hA] Pronunciation Key, 1893–1956, Indian physicist. He was a professor at Allahabad Univ. from 1923 to 1938 and a professor and physics department head at Calcutta Univ. from 1938. His theory of high-temperature ionization of elements and its application to stellar atmospheres, expressed in the Saha equation, is fundamental to modern astrophysics; subsequent development of his ideas has led to increased knowledge of the pressure and temperature distributions of stellar atmospheres.
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