Affiliation: | a Department of Physics, Hislop College, Nagpur 440001, M.S., India b P.G. Department of Chemistry, Hislop College, Nagpur 440001, M.S., India c Department of Physics, Dr. Ambedkar College, Nagpur 440001, M.S., India d Department of Physics, University of Pune, Pune 411007, M.S., India |