Crazy Circle Illusion from Brusspup

Video 27 July 2014 0 Comments

Crazy Circle Illusion from Brusspup

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.  […]

Major Drapkin Illusion Card #18 – The Rod Illusion

Estimation 9 July 2014 0 Comments

Major Drapkin Illusion Card #18 – The Rod Illusion

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 […]

Helicopter Lines Estimation Illusion

Estimation 22 March 2013 0 Comments

Helicopter Lines

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.

Ghost by Ramiro Chavez Tovar

Miscellaneous 1 November 2012 4 Comments

Ghost by Ramiro Chavez Tovar

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.

Length of Lines (View of Street)

Estimation 10 October 2012 0 Comments

Length of Lines (View of Street) - Estimation Illusion

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.

Cafe Wall Illusion

Estimation 23 March 2012 0 Comments

Cafe Wall Illusion

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.

Hering Illusion

Estimation 20 March 2012 0 Comments

Hering Illusion

Do the red lines below appear to bow outward?  Or are they parallel? The red lines are straight and parallel and do not bow outward despite their appearance.  This illusion, known as the Hering illusion, was discovered in 1861 by a German physiologist named Ewald Hering.  The Hering illusion produces the opposite effect of the […]