Prof Lutz<p><span class="h-card" translate="no"><a href="https://mathstodon.xyz/@johncarlosbaez" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>johncarlosbaez</span></a></span> <span class="h-card" translate="no"><a href="https://mathstodon.xyz/@internic" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>internic</span></a></span> playing around with two _circular_ polarizing filters is REALLY fun. Even my most bored students were intrigued. I used to bring in class 3D glasses for everyone.</p><p><a href="https://jasette.facil.services/tags/Physics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Physics</span></a> <a href="https://jasette.facil.services/tags/teaching" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>teaching</span></a> <a href="https://jasette.facil.services/tags/physicsTeaching" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>physicsTeaching</span></a></p>