Question

What is the longest wavelength of h atom in lyman series?

Answer 1

HERE IS YOURS SOLUTION;

◆ For longest λ of Lyman series; energy difference in two levels showing transition should be minimum i.e n2=2n2=2

1λ=RH[112−122]1λ=RH[112−122]

=109678×34=109678×34

λ=1215.67×10−8cmλ=1215.67×10−8cm

=1215.67A∘

HOPE IT HELPS