What Are Meta-Stable States in Atoms and Their Role in Lasing Action?

[moatasim23]

Hey..!Its been a long time since I last posted..Any how I returned..
My question is about mEta stable states in atoms in Lasing Action.Wt actually these states are?And are they justifiable by Bohrs atomic model or Schrodinger Probabilistic orbits?If not then from where these additional states came?

 

[mathman]

Hey..!Its been a long time since I last posted..Any how I returned..
My question is about mEta stable states in atoms in Lasing Action.Wt actually these states are?And are they justifiable by Bohrs atomic model or Schrodinger Probabilistic orbits?If not then from where these additional states came?

They are excited states of the electrons - quantum mechanics presribes them.

http://en.wikipedia.org/wiki/Laser