Light's Ring-around-the-rosey
Optics & Photonics Focus
Volume 3 Story 6 - 24/11/2008

A torus of linked keyrings

Keyrings can be arranged in such a way that they mimic part of the Hopf fibration, namely some circles of the Hopf fibration which lie on a common torus. Copyright: Wikimedia Foundation.
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A torus of linked keyrings. Keyrings can be arranged in such a way that they mimic part of the Hopf fibration, namely some circles of the Hopf fibration which lie on a common torus.