The He+ ion contains only one electron and is therefore a hydrogenlike ion. Calculate the wavelengths, in

Question:

The He+ ion contains only one electron and is therefore a hydrogenlike ion. Calculate the wavelengths, in increasing order, of the first four transitions in the Balmer series of the He+ ion. Compare these wavelengths with the same transitions in a H atom. Comment on the differences. (The Rydberg constant for He+ is 8.72 × 10-18 J.)