Part of the experimental setup for cooling (slowing) and trapping of rubidium atoms. In the gold mirror one can see the reflection of an auxiliary optical setup used to control frequency, intensity and polarization of laser beams.
<a href="//commons.wikimedia.org/w/index.php?title=User:Tomasz_Kawalec&amp;action=edit&amp;redlink=1" class="new" title="User:Tomasz Kawalec (page does not exist)">Tomasz Kawalec</a>
<span class="int-own-work" lang="en">Own work</span>