  In the present study we discuss the effect of variation in the number of
monolayers $n$ on the electronic and optical properties of superlattices (SLs)
(ZnSe)$_n$/(ZnTe)$_n$. The total energies were calculated by the full-potential
linear muffin-tin orbital (FP-LMTO) method, and the exchange-correlation energy
was applied in the local density approximation (LDA). First, the calculations
show a decrease in the derivative of bulk modulus and electronic bandgap with
an increase in the number of monolayers $n$. Second, the radiation energies up
to $15$ eV, the dielectric function $\varepsilon(\omega$), the refractive index
$n(\omega)$, and the reflectivity $R(\omega)$ are studied. These calculations
may be beneficial to understand the properties of short-period superlattices
(ZnSe)$_n$/(ZnTe)$_n$.
