1. Department of Basic science, G H Raisoni University, Amravati, India
2. Department of Physics, G H Raisoni College of Engineering, Nagpur, India
3. Department of Physics, G H Raisoni Institute of Engineering and Technology, Nagpur, India
4. Department of Physics, K D K College of Engineering, Nagpur, India
5. Department of Physics, PGTD, Nagpur, India
6. Department of Physics, Shri Ramdeobaba College of Engineering and Management, Nagpur, India