<p>Optics close ups with lasers on/ off
</p>
Image credit to Isabel Llorente Garcia
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/93636241@N07">UCL Mathematical &amp; Physical Sciences</a> from London, UK
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uclmaps/25961012058/">Optics</a>