Beryllium spectrum; 400 nm - 700 nm
<a href="//commons.wikimedia.org/wiki/User:McZusatz" title="User:McZusatz">McZusatz</a> (<a href="//commons.wikimedia.org/wiki/User_talk:McZusatz" title="User talk:McZusatz"><span class="signature-talk">talk</span></a>)
2013-06-03 16:33:54
<span class="int-own-work" lang="en">Own work</span>