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January 2, 2007

From Michael’sOptical Illusions & Visual Phenomena

What to observe. Above, the tiles are moving left and right in alternating rows. In the ‘half-shifted condition’, the ‘mortar lines’ (the horizontal lines between the tiles) appear to slope alternately upward and downward. This gives the impression that the tiles are wedge-shaped. As seen when the tiles align or make up a chequerboard, the lines are actually parallel, and all tiles are perfectly square and of the same size. So during the movement, the illusion “comes and goes”.

One Response to OPTICAL FUN:

  1. Simon Noble on August 28, 2011 at 2:49 pm

    Hey this is just fantastic, im never seen so many illusions like that before. Its actually quite freaky lol, and the one that I found amazing was the motion induced blindness

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