1. Physics Department, Faculty of Science, Taibah University, Al-Madina al Munawarah, Saudi Arabia
2. Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt
3. Physics Department, Preparatory Year, Deanship of Educational Services, Taibah University, Al-Madina al Munawarah, Saudi Arabia
4. Physics Department, Faculty of Science, Fayoum University, Fayoum, Egypt