Affiliation: | 1.Department of Physics, College of Science,Northern Border University,Arar,Saudi Arabia;2.Department of Astronomy,National Research Institute of Astronomy and Geophysics NRIAG,Helwan,Egypt;3.Department of Mathematics, Preparatory Year,Qassim University,Qassim,Saudi Arabia;4.Department of Physics, Faculty of Science,Northern Border University, Rafha Branch,Rafha,Saudi Arabia;5.Department of Physics, Faculty of Applied Science,Umm AL-Qura University,Makaha,Saudi Arabia |