Mohammed Ahmed, MubarakMohammed Elkhair, Hatim2016-08-082016-08-082016-06-011858-62281858-6228http://hdl.handle.net/123456789/2907Polystyrene(PS)/ZnO/Gum Arabic photonic crystals, prepared by foam reaction had exhibited tunable photonic band gap as being detected by optical transmission experiments with slight shift as shown by the transmission spectra ,such tunability might be attributed to the effect formation caused by PS/ZnO volume fraction .