Calculate wavelength for `2^(nd)` line of Balmer series of `He^(+)` ion

Calculate the wavelength of the second line in Balmer series.

The wavelength of H_(alpha) line in Balmer series is

Calculate the wavelength of the limiting line in Balmer series.

If the wavelength of series limit of Lyman series for He^(+) ion is x Å, then what will be the wavelength of series limit of Balmer series for Li^(2+) ion?

If the wavelength of series limit of Lyman series for He^(+) ions is x overset(0)(A) , then what will be the wavelength of series limit of Balmer series for Li^(+2) ion?

If the wavelength of series limit of Lyman series for He^(+) ion is x Å, then what will be the wavelength of series limit of Balmer series for Li^(2+) ion?

Calculate the wavelength of the first line in the Balmer series of hydrogen spectrum.

Calculate the wavelength of the first line in the Balmer series of hydrogen spectrum