, and shows the asymptotic agreement between the frequency of the radiation and the frequency of a harmonic component in the motion. We arrive, therefore, at the conclusion that transitions for which
changes by more than unity cannot occur. The argument is similar to that by which transitions between two distinctive states of a Planck oscillator for which the values of
in (1) differ by more than unity are excluded. We must further conclude that the various possible transitions consist of two types. For the one type corresponding to the rectilinear component,
remains unchanged, and in the emitted radiation which possesses the same frequency
as the original hydrogen line, the electric vector will oscillate parallel with the field. For the second type, corresponding to the circular components,