  In this paper, optical properties of renormalization group improved (RGI)
Schwarzschild black hole (BH) are investigated in plasma medium. Starting from
the equations of motions in plasma medium, we have shown how the shadow radius
of the RGI black hole is modified. To this end, we have computed the deflection
angle of light in the weak gravity regime for uniform and non-uniform plasma
medium. Importantly, due to the plasma medium, we find that the equations of
motions for light obtained from the radiating and infalling/rest gas has to be
modified. This in turn, changes and modifies the expression for the intensity
observed far away from the black hole. Finally, we have obtained the shadow
images for the RGI black hole for different plasma models. Even thought,
quantum effect changes the background geometry, these effects are very small
and, practically, it is impossible to detect them with the present technology
using the supermassive black hole shadows. The parameter $\Omega$ encodes the
quantum effects and, in principle, one expects such quantum effects to play a
significant role only for very small black holes. On the other hand, the effect
of plasma medium can play important role on the optical appearance of black
holes since they effect and modify the equations of motions.
