Time-dependent perturbation theory question not a hard one

[bojibridge]

Homework Statement

A hydrogen atom is placed in a uniform electric field E(t) given by E(t) = Enaught*exp(-a*t) (where a is a constant) for t >0.

The atom is initially in the ground state. What is the probability that, as
t→∞ , the atom makes a transition to the 2p state?

I know how to do this problem in general, but I'm just curious if by 2p state it means |2 0 0> or |2 1 0>...I want to go with the former, but is that what others would do? Or is it even going to matter?

Thanks so much!

 

[vela]

2s would mean n=2, l=0; 2p means n=2, l=1. If I recall correctly, the electric dipole transition ends up requiring l to change by 1.

 

[bojibridge]

Ah, yes, of course! Thank you! I'd lose my head if it wasn't attached...