はてなブックマーク

Play the movie while looking at the small white speck in the center of the ring. At first, the ring is motionless and it’s easy to tell that the dots are changing color. When the ring begins to rotate, the dots suddenly appear to stop changing. But in reality they are changing the entire time. Take a look. More demonstrations

2009 First prize Arthur Shapiro, Zhong-Lin Lu, Emily Knight, & Robert Ennis American University, University of Southern California, Dartmouth College, SUNY College of Optometry, USA © 2009 Arthur Shapiro, Zhong-Lin Lu, Emily Knight, and Robert Ennis In baseball, a curveball creates a physical effect and a perceptual puzzle. The physical effect (the curve) arises because the ball’s rotation leads t