In this variation of the Cafe Wall illusion, created by Alan Stubbs, the vertical gray lines between the black and white squares appear to be quite wavy. If you take a straight edge (like a sheet of paper or a ruler), however, and hold it up to the lines, you will find that they are […]
In this new video from Youtube sensation Brusspup, a group of eight balls can be seen rotating around in a circle. If you focus on one individual ball at a time, however, you will notice that they are not rotating in a circle pattern at all. Rather, each ball is moving in a straight line. […]
Today’s illusion comes to us straight from the “Roaring ’20s”. It is the 18th card in a series of 25 optical illusion cards published in 1926 by Major Drapkin & Co (London) which was a branch of The United Kingdom Tobacco Co Ltd. The reverse side of the card contains the following: Which is […]
The red and blue lines below span the diameter of two spinning helicopter rotors. When you first look at this image, which line appears to be the longest? Try measuring the two lines to see if you were right. This illustration was drawn by the talented Gianni Sarcone.
If you stare at the center of this pattern designed by Ramiro Chavez Tovar, you should see a series of nonexistent black radial lines coming from the center of the image to the outer edge. Some people have also reported seeing colors and peripheral rotation.
This is an excellent example of the way in which our eyes deceive us. In the street view shown below, the line AB looks to be much longer than line CD. If you measure them, however, you will find that they are exactly the same length.
Are the horizontal lines on the following figure parallel or do they seem to be skewed? They are indeed parallel but appear to run at angles because of the staggered black and white boxes. This illusion is commonly known as the cafe wall illusion.