G. S. RAGHUVANSHI, Ph.D. (IIT Kanpur), is Director, Modi Institute of Technology, Kota, Rajasthan. He had been Pro Vice Chancellor, Director (Academics), Dean (Applied Sciences), and Professor and Head, Department of Physics, Rajasthan Technical University, Kota. He has 40 years of experience in teaching physics, including postgraduate teaching. A life member of the Indian Association of Physics Teachers and ISTE, and a member of IEEE, Professor Raghuvanshi has published 20 research papers in reputed national and international journals.