The frequency of the first line in Lyman series in the hydrogen spectrum is v. What is the frequency of the corresponding line in the spectrum of doubly ionized Lithium?

Options

A. `n`
B. `3n`
C. `9n`
D. `27n`

Answer

C

Explanation

`E=13.6(Z^(2)/n^(2))`
` DeltaE_(H)=(13.6(1)^(2))/(1)^(2)-(13.6(1)^(2))/((2)^(2))`=`10.2eV`=`hv`
`Delta E_(Li)`=`(13.6(3)^(2))/(1)^(1)-(13.6(3)^(2))/(2)^(2)`=`91.80eV`=`h(9v)`