1979, michael white of Tasmania Institute of Higher Education discovered an illusion, which completely changed the visual appearance. The brightness of the gray bar on the left is higher than that on the right. In fact, all the gray bars are the same.

Before White discovered this phenomenon, all brightness illusions were thought to be caused by antagonistic process, that is, gray objects looked darker when surrounded by white objects and brighter when surrounded by black objects. However, in this illusion, the gray bars surrounded by white are brighter and darker when surrounded by black. So far, the brain mechanism behind the white effect is still unknown.

White effect

White effect is a kind of brightness illusion phenomenon, which was discovered by michael white of Tasmania Institute of Higher Education in 1979. As early as 1979, White found that when the brightness of the surrounding environment is different, the brain's perception of the surrounding colors will appear brightness illusion.

Information that exists objectively will be "tampered with", and then the brain will make up another color. Some people's brains can filter out the influence of ambient light, while others can't.

Historical problem: blue and black are platinum, so people who regard skirts as platinum actually "tamper" with information and change their cognition of the objective world. This illusion is also called "white effect".