Institution: | 1.Department of Physics, Govt. P.G. College Gopeshwar, Chamoli, 246401, India ;2.Uttarakhand Science Education and Research Centre, Dehradun, 248006, India ;3.Department of Physics, Govt. P.G. College, New Tehri, Tehri Garhwal, 249001, India ;4.Department of Physics, Gurukula Kangri Vishwavidhyalaya, Haridwar, 249404, India ;5.Department of Physics, Badshahi Thaul Campus, HNB Garhwal University, Tehri Garhwal, 249199, India ; |