The calculated reflectivity spectrum as a function of wavelength is displayed in Fig. 6a. It is
clear that the compound show the maximum reflectivity (50.0 %) at 90.0 nm (i.e in vacuum UV) and
the tail of the reflectivity is (5.0 %) at 400.0 nm. In the visible range the compound process stable
reflectivity of about 5.0 % . The absorption coefficient as function of the wavelength is plotted along
with the experimental ones [23] (Fig. 6b). This figure exhibit that both of the experimental and
theoretical curves are agree well that the compound have maximum absorption in the UV region and
the tail of the absorption is extend till 413.0 nm. It is clear that from Fig. 6 a and b that AgAlO2