Thin film of ZnS is prepared using aqueous solution of zinc acetate & thiourea on the clean glass substrate by using spray pyrolysis method at 3500c. The ZnS film grown is uniform and adherent with high transmittance in the visible region. The optical properties of ZnS thin film are studied using UV- VIS spectrophotometer. Optical absorption measurement in the visible region (380 – 1000nm) were carried out and on the bases of absorption the optical energy band gap is calculated.
