**Author details**

Manal A. Haridy1,2\* and Affia Aslam<sup>2</sup>

\*Address all correspondence to: manal\_haridi@yahoo.com

1 Physics Department, Photometry and Radiometry Division, National Institute of Standards (NIS), Giza, Egypt

2 College of Science, University of Hail (UOH), Hail, Kingdom of Saudi Arabia (KSA)
