But his answer , like all other calculations in the old quantum theory , was only correct for large orbits .
Hendrik Kramers had earlier calculated the relative intensities of spectral lines in the Sommerfeld model by interpreting the Fourier coefficients of the orbits as intensities .
Hendrik Kramers ' answer , like all other calculations in the old quantum theory , was only correct for large orbits .
Hendrik Kramers had earlier calculated the relative intensities of spectral lines in the Sommerfeld model by interpreting the Fourier coefficients of the orbits as intensities .