Meghnad Saha

Meghnad Saha was born on October 6, 1893 in Sheoratali, a village in the District of Dacca, now in Bangladesh. In 1911, he came to Calcutta to study in Presidency College.

Meghnad became famous after his article on solar chromosphere ion' was published in 'Astrophysical journal' in 1920. He came to be recognised as a scientist of substance. In 1920, he went to England to prove his theory before the global scientific community. He went to Prof. Alexander Fowler and Prof. Walter Nurnst of Germany.

Two years later, he came back and joined the University of Calcutta as the Khaira Professor. In 1927, Meghnad was elected as a fellow of London's Royal Society.

He invented an instrument to measure the weight and pressure of solar rays. He produced the famous equation which he called 'equation of the reaction - isobar for ionization' which later became known as Saha's "Thermo-Ionization Equation".

Saha was the leading spirit in organizing the scientific societies like the 'National Academy of Science' (1930), 'Indian Institute of Science' (1935) and the 'Indian Association for the Cultivation of Science' (1944). The lasting memorial to him is the 'Saha Institute of Nuclear Physics' founded in 1943 in Calcutta. He was the chief architect of river planning in India.

He prepared the original plan for Damodar Valley Project. Saha passed away in 1956.