Institution: | 1. Department of Physics, Arunachala College of Engineering for Women, Nagercoil, Tamil Nadu, India;2. Department of Physics, St. Xavier''s Catholic College of Engineering, Nagercoil, Tamil Nadu, India;3. Department of Physics, Periyar Universit- PG Extension Centre, Dharmapuri, Tamil Nadu, India;4. Department of Physics, Chikkanna Government Arts College, Tiruppur, Tamil Nadu, India |