Institution: | 1.Department of Education, Bokaro Steel City College, Bokaro, Jharkhand, India ;2.Department of Physics, Mahishadal Raj College, Mahishadal, W.B., 721628, India ;3.University Department of Physics, Vinoba Bhave University, Hazaribag, India ;4.University Department of Physics, Binod Bihari Mahto Koyalanchal University, Dhanbad, India ; |