The squares marked A and B are the same shade of gray.
![](http://persci.mit.edu/wp-content/uploads/checkershadow_illusion4full-1024x796.jpg)
©1995, Edward H. Adelson. These checkershadow images may be reproduced and distributed freely.
Perceptual Science Group @ MIT
The squares marked A and B are the same shade of gray.
©1995, Edward H. Adelson. These checkershadow images may be reproduced and distributed freely.