Question

What is the shortest wavelength line in the Paschen series of `Li^(2+)` ion ?
A. `(R)/(9)`
B. `(9)/(R)`
C. `(1)/(R)`
D. `(9R)/(4)`

Answer 1

Correct Answer - 3
`(1)/(lambda)=RZ^(2)[(1)/(n_(1)^(2))-(1)/(n_(2)^(2))]=Rxx3^(2)[(1)/(3^(2))-(1)/(oo^(2))]" "rArr" "R or lambda=(1)/(R)`