1. 1Department of Physics, University of Rajasthan, JLN Marg, Jaipur, Rajasthan, India.
2. 3Government College Pratapgarh, Rajasthan, India
3. 4Government College Jhunjhunu, Rajasthan, India.
4. 5Centrefor Non-Conventional Energy Resources, University of Rajasthan, Jaipur, Rajasthan, India