In this investigation we consider a semiclassical fully ionized plasma in which interparticle interactions are treated by means of an effective potential taking into account both quantum and correlation effects. An expression for the dielectric function corresponding to the generalized Drude–Lorentz formula is obtained beyond assumptions on the homogeneity of electromagnetic waves. The reflection index of semiclassical electron plasmas is then calculated and a comparison is made with similar results yielded by the method of moments.