A. MARIKANI, Ph.D., is Professor and Head, Department of Physics, Mepco Schlenk Engineering College (Autonomous), Sivakasi, Tamil Nadu. With over 34 years of teaching experience, Dr. Marikani has authored several books. He has completed three sponsored research projects sponsored by DRDO, New Delhi, BRNS, Mumbai and SERB, DST, New Delhi. He has published more than 40 research articles in various International and National journals.