question_answer

In \[L{{i}^{++}},\] electron in first Bohr orbit is excited to a level by a radiation of wavelength 1. 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 1 (in nm)? (Given:\[h=6.63\times {{10}^{-34}}Js;\text{ }c=3\times {{10}^{8}}m{{s}^{-1}}\])

Answer:

10.8