Turning Rings
Two rings of small squares. Keep your eyes on the centre and move the picture in and out.
这个体验还没有翻译，所以文字仍是英文。
玩法
先看，再回答
Two rings of small squares. Keep your eyes on the centre and move the picture in and out.
- 不到一分钟 · 1 个问题 · 然后是解释
原理 — 建议试过之后再读
Growing becomes turning
Nothing rotates; the picture only grows and shrinks. As it grows, every square moves straight outwards from the centre, but each one’s dark and light edges are tilted, and the cells that detect motion at such an edge can only tell how it moves across its own direction. Their tilted answers, added up around a ring, make a turn.
Baingio Pinna and Gavin Brelstaff described it in 2000. The two rings are tilted and shaded opposite ways, so their turns go opposite ways too. It also works with the phone held in your hand, moving your head in and out.