Affiliation: | 1.PG and Research Department of Physics,Arignar Anna Government Arts College,Cheyyar,India;2.Department of Physics,Presidency College,Chennai,India;3.Department of Physics,University College of Engineering, Bharathidasan Institute of Technology Campus, Anna University,Tiruchirappalli,India;4.Department of Physics,Thirumalai Engineering College,Kanchipuram,India |