eng Science and Education Publishing International Journal of Physics 2333-4576 2018-05-03 6 3 53 56 10.12691/ijp-6-3-1 IJP2018631 article Ali Salih Ali Sali61957@gmail.com 1 Mubarak Dirar Abdalla 2 Mohammedian Adam 3 Physics Department, Faculty of Education, University of Kordofan, Elobied, Sudan Physics Department, Faculty of Science, Sudan University of Science and Technology, Khartoum, Sudan Physics Department, Faculty of Science, University of Kordofan, Elobied, Sudan A new set of soda lime glasses doped with ZnO were prepared by melt quenching technique. The aim of this work is to investigate physical and optical properties of prepared glasses using Archimedes' method, and UV-VIS-NIR spectrometer. The data were analyzed by Origin Graph Program (version 8.6). The results shows that the density of glasses increases in rang 2.486 ~ 2.5656g/cm3, with increasing of concentration of ZnO because of higher molecular weight of ZnO compared with SiO2. The molar volume of glasses decreases, in range 24.1255 ~ 23.4019 cm3/mol, with increasing of concentration of ZnO, this indicates that the structures of glasses more compacted with addition of ZnO. The refractive index and optical energy band gap of glasses change in range 1.314 ~ 1.504 and 3.049 ~ 3.253 eV respectively, because of change of non-bridging oxygen. The absorbance of UV-VIS rays shows that ZnO have a good effect on glass transparency. http://pubs.sciepub.com/ijp/6/3/1/ijp-6-3-1.pdf density glass refractive index transparency absorption