In Li^+ +, electron in first Bohr orbit is excited to a level by a radiation of wavelength . When the ion gets
deexcited to the ground state in all possible ways (including intermediate emissions), a total of six spectral
lines are observed. What is the value of ?
(Given : H = 6.63 × 10^–34 Js; c = 3 × 10⁸
ms
^–1)