https://www.andreamaiani.com/tags/magnetism/Recent content in Magnetism on Andrea Maiani, PhDHugo -- gohugo.ioen-USTue, 06 Oct 2026 09:00:00 +0200https://www.andreamaiani.com/posts/research_post/magnetic-twist-steers-light/Tue, 06 Oct 2026 09:00:00 +0200https://www.andreamaiani.com/posts/research_post/magnetic-twist-steers-light/<p>Put on a pair of polarized sunglasses, look at your phone, and slowly turn it. On most phones, at one angle the screen goes dark. The screen sends out polarized light: its electric field oscillates along a single direction. The lenses absorb light polarized along one direction and let the perpendicular one through, so when the screen&rsquo;s direction matches the one the lenses absorb, nothing gets through. That direction is fixed once and for all when the lenses are made.</p>