Selection rules for hydrogen

  • Thread starter M. next
  • Start date
  • #1
382
0
Please see attachment. What are the arrow heads supposed to mean? Only emission is allowed and no absorption?
I mean, selection rules allow Δl=±1. But the figure is saying otherwise.

I also read in another book, that the only series observed in absorption is that to the ground state, where it is called the p-series.

Please explain, I am kind of lost in figures and resources.
 

Attachments

  • Screenshot_2013-04-13-14-20-24_20130413142054077-1557689002.jpg
    Screenshot_2013-04-13-14-20-24_20130413142054077-1557689002.jpg
    17.4 KB · Views: 451

Answers and Replies

  • #2
35,439
11,868
The image is drawn for emission only - absorption is possible, too, if you have some source of light. The combination of excited atoms plus light of the right frequency for a transition can be rare, however.
 
  • #3
382
0
But if I reversed the arrows in this figure so that I aim to draw a figure of absorption, all drawn lines will be possible, no?
(i.e, if I reversed the heads with tails of all arrows presented in the figure).
 
  • #4
35,439
11,868
They are possible, but you won't see most absorption lines if you shine light on hydrogen in its ground state.
 
  • #5
382
0
Ok, thanks, I just wanted to make sure of they were possible! As selection rules explain. Thanks again.
 

Related Threads on Selection rules for hydrogen

  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
1
Views
4K
Replies
3
Views
3K
  • Last Post
Replies
1
Views
4K
Replies
1
Views
818
Replies
2
Views
2K
Replies
2
Views
1K
  • Last Post
Replies
1
Views
1K
Top