Under inversion, electric and longitudinal spherical harmonics behave in the same way as scalar spherical functions, i.e. I ^ ^ N J M ( θ θ , φ φ ) = ( − − 1 ) J N J M ( θ θ , φ φ ) , and magnetic ones have the opposite parity: I ^ ^ M J M ( θ θ , φ φ ) = ( − − 1 ) J + 1 M J M ( θ θ , φ φ ) ,