الفهرس 
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Abstract
Film thicknedd have been determined using multiplebeam Fizeau fringes at reflection. The thickness of the films ranged between 600Å and 1800Å. X-ray diffraction patterns reveal that the bulk and film samples are polycrystalline. Optical transmission and reflection (T and R)have been studied, and it was found that no bands were observed in both (T and R) altough the absorption edge is observed in the UV-region in all samples.