How Does Δml=0 and Δl=±1 Apply in Quantum Mechanics?

[pluspolaritons]

The selection rules state that:
Δl=±1
Δm_l=0,±1

I can't figure out a case where Δm_l=0 and Δl=±1, can anyone help by giving an example? Thanks.

 

[DrDu]

E.g. emission of light by an excited hydrogen atom with the electron being in a p_z (m=0, l=1) to the s orbital (m=0, l=0).

 

[pluspolaritons]

E.g. emission of light by an excited hydrogen atom with the electron being in a p_z (m=0, l=1) to the s orbital (m=0, l=0).

Got it! Thanks!