See attached file for full problem description with proper diagrams.
Question: Use the Bohr theory to find the series wavelength limits of the Lyman and Paschen series of hydrogen.
Answers: 91.13 nm (Lyman)
820.1 nm (Paschen)
I'm thinking that I need to use the formula below, but I don't really understand why nfinal and ninitial are specific to certain series and how you have any idea what nfinal is for a certain series.
The solution presents clear formulas used in solving the problem.