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The Droste effect (Dutch pronunciation:), known in art as an example of mise en abyme, is the effect of a picture recursively appearing within itself, in a place where a similar picture would realistically be expected to appear. This produces a loop which in theory could go on forever, but in practice only continues as far as the image's ...
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The Ternus illusion (1926/1938) is based upon apparent motion. Thaumatrope: A thaumatrope is a toy that was popular in Victorian times. Trompe-l'œil: Troxler's fading: Troxler's fading: When one fixates on a particular point for even a short period of time, an unchanging stimulus away from the fixation point will fade away and disappear ...
The most well-known version of this illusion is known as the stopped-clock illusion, wherein a subject's first impression of the second-hand movement of an analog clock, subsequent to one's directed attention (i.e., saccade) to the clock, is the perception of a slower-than-normal second-hand movement rate (the second-hand of the clock may ...
Crossword. Solve puzzle clues across and down to fill the numbered rows and columns of the grid with words and phrases. By Masque Publishing
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The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.
Date/Time Thumbnail Dimensions User Comment; current: 20:08, 29 November 2012: 720 × 900 (6 KB) AnonMoos: The "Blivet" or "Poiuyt" impossible object shown against a warped checkerboard optical illusion background. There are no curved lines in the picture, except the ovals at the ends of the tines of the fork. Self-made image, derived by ...