A simple plot showing the distribution of Lyman series absorption/emission lines. I made the plot, and it's free for use.
<a href="https://en.wikipedia.org/wiki/User:Adriferr" class="extiw" title="wikipedia:User:Adriferr">Adriferr</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
31 March 2006 (original upload date)
Transferred from <span class="plainlinks"><a class="external text" href="https://en.wikipedia.org">en.wikipedia</a></span> to Commons.