 Thus in the limit of large \(n\) the amplitudes of the harmonic components of the electron’s classical orbit can be used to calculate the intensities of the spectral lines. While classically the intensity of radiation is determined by its amplitude, quantum mechanically the intensity of a spectral line is determined by how many photons are emitted at that particular frequency. Hence, the more probable a particular quantum transition is, the more photons will be given off, and the greater the intensity. Note that, as with the frequency interpretation, this is a correspondence that holds only statistically and only in the limit of large quantum  numbers.[4]