A restaurant door in Tirana, Albania, opens barely to make a slit allowing the morning sunllight to diffract showing the visible spectrum; photo is a close-up..
<a href="//commons.wikimedia.org/w/index.php?title=User:Rlbowman937&amp;action=edit&amp;redlink=1" class="new" title="User:Rlbowman937 (page does not exist)">Richard L. Bowman</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>