1. Department of Physics, Raghunathpur College, Raghunathpur 723133, Purulia, West Bengal, India
2. Beramara RamChandrapur High School, South 24-Pgs, 743609(WB), India
3. West Kodalia Adarsha Siksha Sadan, New Barrackpore, Kolkata 700131, India
4. Physics and Applied Mathematics Unit (PAMU), Indian Statistical Institute, Kolkata 700108, India