# How Lyman transition (to the ground state from higher excited) happens ? The dipole selection rule is +/- 1?

How are the lyman series observed when the dipole selection rule is +/-1 in l change for hydrogen atom ?

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## 1 Answer

The dipole selection rules is about angular momentum quantum number. Only principal quantum number is relevant about Lyman series.

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Ok I got it is from 4p l=1 to 1s l=0 for example. Thanks. –  user12445 Sep 26 '12 at 6:59
@user12445: Then accept my answer. –  Siyuan Ren Sep 26 '12 at 9:50