In Li
+ +
, electron in first Bohr orbit is excited to a level by a radiation of wavelength $\lambda . 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 \lambda $?
(Given : H = 6.63 × 10
–34
Js; c = 3 × 10
8
ms
–1
)