In photons of energy 12.75 eV are passing through hydrogen gas in ground state then no. of lines in emission spectrum will be

Options

A. 6
B. 4
C. 3
D. 2

Answer

A

Explanation

`12.75=|E_(0)-(E_(0))/(n^(2))|=|-13.6-((-13.6)/(n_(1)^(2)))|`
`impliesn=4`
no. of lines `=(n(n-1))/(2)=6`