At this exhibit, find out how subjective brightness can be as you struggle—and fail—to correctly decide whether the squares you see are black or white.
Your perception of an object’s color is affected by both its lighting and its surroundings. The first card you see in this exhibit is actually black—but it’s brightly lit. When it’s the only card in the light, it may look gray or even white. But as you raise lighter cards, each new card looks white and the previous cards look darker by comparison.