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•• Find the range of wavelengths in each of the Lyman, Balmer, and Paschen series of hydrogen. Show that the lines in the Lyman series are all in the UV region, those of the Paschen are all in the IR region, while the Balmer series is in the visible and UV regions. (Note that visible light ranges from violet at about 400 nm to deep red at about 700 nm.) Show that these three series do not overlap one another but that the next series, in which the lower level is n = 4, overlaps the Paschen series.
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