He II, O III lines?

Piano man

Hi everyone,

I think this is a relatively straightforward question, but I can't find a simple answer for it on Google.
What do the Roman numerals stand for in He II and O III in relation to spectroscopy?

Thanks.

Ken G

He I is neutral, He II is once ionized, etc. A clunky notation, to be sure-- kind of like how 2011 is the "21st century."

Piano man

Thanks, that rings a bell alright - had a feeling it was something along those lines (no pun intended...) Cheers :D

Similar Threads for: He II, O III lines?
Thread	Forum	Replies
Drawing equipotential lines and field lines	Introductory Physics Homework	3
Understanding Equipotential Lines and their relationship with Electric Field Lines	General Physics	3
Drawing Electric Field Lines and Equipotential Lines	Introductory Physics Homework	6
Transient Signals on Transmission Lines: Cascaded T-lines that switch states chart	Engineering, Comp Sci, & Technology Homework	3
find the shortest distance between 2 non-paralle lines (skew lines) in 3-space	Calculus	4

Piano man	He II, O III lines? Tweet Hi everyone, I think this is a relatively straightforward question, but I can't find a simple answer for it on Google. What do the Roman numerals stand for in He II and O III in relation to spectroscopy? Thanks.

Ken G Recognitions: Gold Member	He I is neutral, He II is once ionized, etc. A clunky notation, to be sure-- kind of like how 2011 is the "21st century."