Rotating Discs

In this exhibit there are two discs, the depth spinner disc and the Ben ham’s disc. In the first disc, when we stared at the moving pattern, our eyes and brain got used to seeing the movement. When we looked at the wall, it appeared to be moving. On the second disc, when we gazed at one place, we were looking at alternating flashes of black and white. Our eyes and brain could see the white color only when all three cones were responding equally.