If the jth rotational energy is given by [J(J+I)ħ2]/(2μR2) of a diatomic molecule where μ is the reduced mass of both particles, I is the moment of inertia ,J is the rotational quantum number and R the bond length, what happens when we look at the lowest energy level, where J=0. Does this mean that molecules occupying the rotational ground state have zero rotational energy?