1. Physics Section, Mahila Maha Vidyalaya, Banaras Hindu University, Varanasi-221005, Uttar-Pradesh, India
2. Department of Physics, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar-Pradesh, India
3. Department of Zoology, Dr Harisingh Gour Central University, Sagar-470003, Madhya-Pradesh, India
4. Department of Physics, Dr Harisingh Gour Central University, Sagar-470003, Madhya-Pradesh, India