  The optical conductivity in a Kondo lattice system is presented in terms of
the memory function formalism. I use Kondo-lattice Hamiltonian for explicit
calculations. I compute the frequency dependent imaginary part of the memory
function ($M^{\p\p}(\om)$), and the real part of the memory function
$M^{\p}(\om)$ by using the Kramers-Kronig transformation. Optical conductivity
is computed using the generalized Drude formula. I find that high frequency
tail of the optical conductivity scales as $\sigma(\om) \sim \frac{1}{\om}$
instead of the Drude $\frac{1}{\om^2}$ law. Such a behaviour is seen in strange
metals. My work points out that it may be the magnetic scattering mechanisms
that are important for the anomalous behaviour of strange metals.
