1. Physics Department, Faculty of Science, University of Tabuk, 71491 Tabuk, Saudi Arabia
2. Physics Department, Faculty of Sciences, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
3. Mathematics Department, Faculty of Science, University of Tabuk, 71491 Tabuk, Saudi Arabia
4. Department of Polymer Engineering, University of Chemical Technology and Metallurgy, 1756 Sofia, Bulgaria
5. College of Telecommunications and Posts, 1700 Sofia, Bulgaria
6. Department of Physics, Faculty of Science, Suez Canal University, Ismailia, Egypt