1. Department of Applied Physics; Ashoka Institute of Technology and Management; G.E. Road; Rajnandgaon; 491441 (C.G.); India
2. Department of Physics; Government Postgaduate College; Seoni (MP); India
3. Department of Physics; Arts and Commerce Girls College; Devendra Nagar; Raipur; 492001 (C.G.); India