  We report an alternative explanation of the variation of charged particle to
photon ratio in Cu+Cu collisions and Au+Au collisions from 1.4 $\pm$ 0.1 to 1.2
$\pm$ 0.1 at $\sqrt{\it{s}_{\rm NN}}$ = 62.4 GeV and 200 GeV respectively in
STAR experiment at RHIC. Based on the theoretical predictions and experimental
results we argue that the additional contribution of direct photons at
$\sqrt{\it{s}_{\rm NN}}$ = 200 GeV in both Cu+Cu and Au+Au collisions are
improving the ratio $\frac{N_{ch}}{N_{\gamma}}$ to 1.2 $\pm$ 0.1 from 1.4 $\pm$
0.1.

High Energy Physics - Phenomenology;Nuclear Theory