Meghnad Saha (6 October 1893 – 16 February 1956) was an Indian astrophysicist who helped devise the theory of thermal ionisation. His Saha ionisation equation allowed astronomers to accurately relate the spectral classes of stars to their actual temperatures. Saha's equation is considered one of the ten most outstanding discoveries in astronomy and astrophysics since Galileo's invention of the telescope in 1608. He was elected to the Parliament of India in 1952. Wikipedia
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