23 March 2011

Optical illusion



When you watch the video, you may need to freeze-frame it to inspect the checkerboard pattern.  The little dots create the illusion that the board lines are not rectilinear; when they are blown away by the guy wearing the hat (upper left), the pattern becomes evident.

The creator of this video has a much longer video incorporating a variety of optical illusions at this YouTube link.

Via New Scientist.

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