Davide Bucci<p>This morning I had a fun moment when I discovered that sunlight reflected inside the dustbin in my office formed a very nice <a href="https://mastodon.sdf.org/tags/caustic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>caustic</span></a> that is practically the classic schoolbook example of spherical <a href="https://mastodon.sdf.org/tags/aberration" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>aberration</span></a>. I sent the pictures to my office mate, who incidentally teaches ray <a href="https://mastodon.sdf.org/tags/optics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>optics</span></a> and we were amused about it with other colleagues this afternoon. <a href="https://en.m.wikipedia.org/wiki/Spherical_aberration" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.m.wikipedia.org/wiki/Spheri</span><span class="invisible">cal_aberration</span></a> <a href="https://mastodon.sdf.org/tags/physics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>physics</span></a> <a href="https://mastodon.sdf.org/tags/rayoptics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>rayoptics</span></a></p>