A chemical reduction process was employed for formation of CdS-Ag CSNs. Consequently, different weight percentages of these core shells were embedded in PVA. These films were exposed to UV radiation and changes in optical, structural, and dielectric parameters were observed. X-ray diffraction and transmission electron microscopy was done to establish formation of CSNs. By evaluation of UV-Vis data band gap of PVA was observed to reduce after embedding CSNs and linear and non-linear optical parameters like n0, χ[1], χ[3], n2 were discussed corresponding to weight percent and UV exposure. Effect of weight percent of CSNs and UV on structure, ac conductivity, and dielectric parameters is discussed in detail.