Windmill illusion

A visual illusion in which the blades of a windmill appear to reverse the direction of their rotation.

The Windmill Illusion is a visual illusion in which the blades of a windmill appear to reverse the direction of their rotation. The illusion was first described by Robert Smith, an English mathematician (1689–1768), in the book A Compleat System of Opticks (1738).

Smith noted that the illusion can also be observed in weather-cocks and flags. The windmill illusion should not be confused with the wagon wheel illusion, though it is closely related to the same kinetic depth effect

image
Windmill illusion
resources
  • Windmill Illusion on youtube.com
  • "Millusion": Windmill Illusion 2016 on youtube.com
  • The Windmill Illusion - JSTOR on jstor.org
  • A Visual Explanation of the Illusion That Makes a Windmill Appear to Spin in the Opposite Direction on laughingsquid.com
  • The Windmills of your Mind Illusion on youtube.com
source
Adapted from content published on oxfordreference.com
credit
  • Image By Willard84 - Own work, CC BY 3.0 — from wikimedia.org
Last modified on May 23, 2021, 10:25 pm
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