Institution: | 1.Department of Physics, American College, Madurai, India ;2.PG and Research Department of Physics, Sree Sevugan Annamalai College, Devakottai, India ;3.Department of Physics, Alagappa Govt. Arts College, Karaikudi, India ;4.Department of Physics, Kalasalingam University, Krishnankoil, 626 190, India ; |