The Li²⁺ ion is essentially identical to the H atom in Bohr’s theory, aside from the effect of the different nuclear charges and masses. 

(a) What transitions in Li²⁺ will yield emission lines whose wavelengths are very nearly equal to the first two lines of the Lyman series in hydrogen? 

(b) Calculate the difference between the wavelength of the
Lyman a line of hydrogen and the emission line from Li²⁺ that has very nearly the same wavelength.