optical+illusions
31Café wall illusion — The café wall illusion The café wall illusion is a geometrical optical illusion in which the parallel straight dividing lines between staggered rows with alternating black and white bricks appear to be sloped. It was first described under the… …
32Hollow-Face illusion — This face of Björn Borg appears convex (pushed out), but is actually concave (pushed in). The Hollow Face illusion (also known as Hollow Mask illusion) is an optical illusion in which the perception of a concave mask of a face appears as a normal …
33Hidden faces — People often see hidden faces in things. This is a kind of optical illusion. When an artist notices that two different things have a similar appearance, and draws or paints a picture making this similarity evident he makes images with double… …
34number game — Introduction any of various puzzles and games that involve aspects of mathematics. Mathematical recreations comprise puzzles and games that vary from naive amusements to sophisticated problems, some of which have never been solved.… …
35My Oracle Lives Uptown — Studio album by William Orbit Released 4 May 2009 …
36illusion — 01. The idea that if you work hard enough, you re sure to succeed is an [illusion]. Lots of people work hard all their lives without really getting ahead. 02. Mirrors on the walls give the room the [illusion] of being much bigger than it really… …
37Alhazen — For the Moon crater, see Alhazen (crater). For the asteroid, see 59239 Alhazen. Alhazen Alhazen (Ibn al Haytham) …
38Multistable perception — Examples of visually ambiguous patterns. Multistable perceptual phenomena are a form of perceptual phenomena in which there are unpredictable sequences of spontaneous subjective changes. While usually associated with visual perception, such… …
39Lilac chaser — is a visual illusion, also known as the Pac Man illusion. It consists of 12 lilac (or pink, rose or magenta), blurred disks arranged in a circle (like the numbers on a clock), around a small black, central cross on a grey background. One of the… …
40Ambiguous image — Ambiguous images are optical illusion images which are crafted to exploit graphical similarities and other properties of visual system interpretation between two or more distinct image forms. These are famous for inducing the phenomenon of… …
