Marijuana University

  Yorick's skull | Vision distorter | Strange terrace | Spirals | Short Circuit your brain | Rotating snake | Primrose field Optical trick square | Optical trick block | Mystery picture | Moving circle | Face | Impossible triangle                        How many colors | How can this be true | Find the face among the beans | Faces | Enigma | Counting cubes  Clinton/Gore? | City block | Circles | Carbon dioxide | Bulge | Brain teaser | Brain teaser 2 | Brain teaser 3 | Blind spot  Black dot | After image | 3 D Tube
 

 

After Image

Instructions: Stare at the black spot in the center of the four colored squares for about 30 seconds. Then scroll down and move your gaze to the black spot in the uniform white area. Note the colors of the afterimages relative to the colors of the original stimuli. Did they appear different?

Stare at the dot for 30 seconds, then scroll down