Answer
See answers.
Work Step by Step
Figure 27-24 shows the Balmer series for hydrogen, the wavelengths of light emitted by electrons as they fall from a high energy level down to the n=2 level.
Figure 27–29 shows that as n increases, the energy levels become closer and closer together. For electrons that begin from any of these closely-spaced energy levels and drop down to the n = 2 level, the energies of emitted photons, and thus their wavelengths, are going to be very similar. These correspond to the closely-spaced spectral lines at the top of Figure 27-24.
In summary, the radiation from downward electron transitions that start at the closely-spaced energy levels in Figure 27-29 correspond to the closely-spaced spectral lines in Figure 27–24.