Calculate the wavelength of the 4th member of the Paschen Series.

The first member of the Balmer series has a wavelengtjh of 6561A^@ . Find the wavelength of the 4th member of the Brackett series.

Calculate the longest wavelength of the Paschen series spectrum. (Rydberg constant = 1.97 xx 10^7 xx 10^7 m^-1)

Calculate the wavelength of a photon of energy 10 eV.

The wavelength of the first member of the Lyman series is 1215A^@ . The wavelength of the second member of the Balmer series is

Calculate the longest wavelength of the Balmer series spectrum