A. A. Alkufi 1.University of Babylon, College of education for pure sciences, Department of Physics, Babylon, Iraq
2. Education Directorat e of Najaf, Ministry of Education, Al-Najaf, Iraq Iraq
A. A. Abojassim University of Kufa, Faculty of science, Department of Physics, Al-Najaf, Iraq Iraq
M. H. Oleiwi University of Babylon, College of education for pure sciences, Department of Physics, Babylon, Iraq Iraq