Entropy in a system constitute by an atom and a photon

Suppose that we have an atom $A$ in an excited state. This atom has a probability of emitting a photon $gamma$. If we are in a finite space there is a probability that the atom $A$ absorbs the photon $gamma$.
My question is when the atom emits the photon is the entropy ($S$) greater than zero? If so,when the atom absorbs the photon is the entropy ($S$) less than zero?