http://us.gizmodo.com/5881570/this-optical-illusion-will-give-you-a-headache-for-the-next-two-hours
These are four perfectly round, concentric circles. Wait no, they aren't. Oh yes, they are. No, they are not. Are they? No. Yes. Would you please stop moving right now? Stupid circles made of stupid squares. [Thanks Karl!]
この絵は四つの完璧に丸い同心円で構成されているらしいのですが本当にそうなんでしょうか。
検証は続きから。続きを読む