1. Department of Applied Sciences, Punjab Technical University, Jalandhar, India
2. Department of Applied Science, Ferozepur College of Engineering and Technology, Farozshah, Ferozepur, India
3. Department of Physics, Dr. B.R.Ambedkar National Institute of Technology, Jalandhar, India
4. Department of Physics, HNB Garhwal University, Tehri Garwal, India