Why Do Paintings Seem to Move When You Walk by Them?

Imagine you're walking past a big poster on the wall. When you’re far away, it looks still, like any other picture. But as you get closer, it seems to wiggle and move, almost like it's breathing! This is because your eyes are doing something clever when you walk by: they see changes in detail and motion very quickly. It’s a bit like watching a cartoon on TV, the more frames per second, the smoother the motion looks. That’s why some paintings look alive as you move past them.

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Examples

  1. A poster of a dancing ballerina seems to move as you walk past it.
  2. A painted sunset wiggles slightly when you pass by.
  3. A mural with dots on it flickers like stars when you walk up to it.

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