1. Renewable Energy Science & Engineering Department, Faculty of Postgraduate Studies for Advanced Science Beni‐Suef University Beni‐Suef Egypt
2. Physics Department Faculty of Science, Minia University Minia Egypt
3. Physics Department Faculty of Science, University of Tabuk Tabuk Saudi Arabia
4. Physics Department Faculty of Science, Fayoum University Fayoum Egypt
5. Physics Department Faculty of Education, Ain Shams University Cairo Egypt