calculate the wavelength of spectral line obtained in the spectrum og Li^(2+) in the lyman spectrum from n=3

calculate the wavelength of spectral line obtained in the spectrum og

1.	calculate the wavelength of spectral line obtained in the spectrum og Li^(2+) in the lyman spectrum from n=3
Answer» TRANSITION occurs in between the levels n 1 and n 2 . Thus, if then GIVENN 1 +n 2 =4n 2 −n 1 =2 ∴n 2 =3,n 1 =1Therefore, λ1 =R H ×Z 2 [ 1 2 1 − 3 2 1 ] (∵Z=3 for LI)=109678×3 2 ×[8/9]∴λ=1.14×10 −6 cm