Zöllner's Illusion


In this illusion, the vertical lines in the above figure are parallel, but appear to be tilted at an angle. In 1860, F. Zöllner sent his discovery in a letter to physicist and scholar J. C. Poggendorff, editor of Annalen der Physik und Chemie, who subsequently discovered the related Poggendorff illusion.

See also

Café Wall Illusion, Illusion, Parallel Lines, Poggendorff Illusion, Ponzo's Illusion

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Update a linkIllusionWorks. "Poggendorf [sic]." a linkIllusionWorks. "Zollner.", S. "Some Visual Illusions Occurring in Interrupted Systems.", T. The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, p. 172, 1989.

Referenced on Wolfram|Alpha

Zöllner's Illusion

Cite this as:

Weisstein, Eric W. "Zöllner's Illusion." From MathWorld--A Wolfram Web Resource.

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