DR SK MITRA, INDIAN PHYSICIST. he workedunder Raman on diffraction of light and interference of and got DSc. later he went to university of Paris and obtained his second doctorate. hd aloso worked under madam curie in France. he also worked on radio valve circuitry under Guttonon at his lab. return to India he was appointed as khaira prof of physicdat razbazar science College, University Of calcutta university . With his great influence wireless coursexwas introduced in M school curriculum as elective. a wireless lab was, established to conduct research. In radio valves and radio propagation. he was, awarded padma bhushan apart fromFRS, FIAS, FASB AND MBE.