Question

7. The shortest wave length in H spectrum
of Lymen series when Ry = 109678
cm-1 is
(1) 1002.7Á (2) 1215.67Ã
(3) 1127.30Á (4) 911.7A​

Answer 1

Answer:

1215.67A°

Explanation:

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

1λ=RH[112−122]

=109678×34

λ=1215.67×10−8cm

=1215.67A∘