The quantised rotational energy levels of a diatomic molecule with two different nuclei and moment of inertia I, are given by Eᵣ = (ℏ²)/(2I) r(r+1), r=0,1,2,... (i) Obtain an expression for..
a) the vibrational energy levels
b) the translational energy levels
c) the electronic energy levels
d) the total energy levels