optical+illusions
61Optic axis — Optic Op tic ([o^]p t[i^]k), Optical Op tic*al ([o^]p t[i^]*kal), a. [F. optique, Gr. optiko s; akin to o psis sight, o pwpa I have seen, o psomai I shall see, and to o sse the two eyes, o ps face, L. oculus eye. See {Ocular}, {Eye}, and cf.… …
62Intellectual rights to magic methods — refers to the legal and ethical debate about the extent to which proprietary or exclusive rights may subsist in the methods or processes by which magic tricks or illusions are performed. It is a subject of some controversy. On one side, many… …
63cognitive illusion — Also known as strategy illusion and perceptual illusion. The term cognitive illusion is indebted to the Latin noun cognoscere, which means to learn or to scrutinize. It refers to an * illusion arising as a consequence of unconscious inferences …
64Op art — Not to be confused with pop art or plop art. Movement in Squares, by Bridget Riley 1961 Op art, also known as optical art, is a style[1] of visual art that makes use of optical ill …
65Maze — Not to be confused with Maize. For other uses, see Maze (disambiguation). Part of a series on Puzzles …
66Salvador Dalí — This is a Catalan name. The first family name is Dalí and the second is Domènech. Salvador Dalí Salvador Dalí photographed by Carl Van Vechten on November 29, 1939 Birth name …
67Ufology — is a neologism coined to describe the collective efforts of those who study unidentified flying object reports and associated evidence. Not all ufologists believe that UFOs are necessarily extraterrestrial spacecraft, or even that they are… …
68Cornsweet illusion — Cornsweet illusion. Left part of the picture seems to be darker than the right one. In fact they have the same brightness …
69Oregon Vortex — The Oregon Vortex is a roadside attraction located in Gold Hill, Oregon, in the United States. It consists of a number of interesting effects which skeptics believe to be optical illusions, but which the attraction s proprietors claim are the… …
70Orbison illusion — The Orbison illusion is an optical illusion that was first described by the psychologist William Orbison in 1939. The bounding rectangle and inner square both appear distorted in the presence of the radiating lines. The background gives us the… …
