Nanostructured ferromagnets have been the subject of vigorous research owing to their applications in magnetic recording. Efforts are underway to increase the data storage density and hence reduce the size of bit-storing grains and the inter-grain separation. If it is successful, the incorporation of ferromagnetic QDs in semiconductors may open the possibility of integration of microelectronics with recording and storage technologies. This study focuses on the investigation of the reflectivity of Fe QDs embedded in ZnS matrix, in particular, in the UV spectral range, for exploring the nano-size effects of these particles in photon reflectivity. The reflectivity results obtained on several Fe QD samples together with those from pure ZnS thin films seem to indicate that Fe QDs can act as effective scattering centres in the UVA range. More interestingly, an absorption band at around 340 - 350nm was observed for Fe QD samples. Several samples containing Fe QDs embedded in ZnS matrix were prepared by the molecular beam epitaxy. The underlying physics of these findings are Electromagnetic (EM) scattering and Thin film interference.