Sisir Kumar Mitra (or Shishirkumar Mitra) MBE, FNA, FRS (October 24, 1890 – August 13, 1963) was an Indian Bengali physicist.Mitra was born and raised in Calcutta. His parents were the doctor Saratkumari and the school teacher Jaykrishna. At the age of nine he witnessed a hot air balloon and became intrigued in the phenomenon, so he began studying science. The family moved to Bhagalpur, where Sisir attended school and the local college. After his father died, his mother supported him through Presidency College of the University of Calcutta where he earned a B.Sc. In 1912 he gained his M.Sc. at the same institution. Wikipedia
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