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  2. Schroeder stairs - Wikipedia

    en.wikipedia.org/wiki/Schroeder_stairs

    Schroeder stairs can be perceived in two ways, depending on whether the viewer considers A or B to be the closer wall. Schroeder stairs (Schröder's stairs) is an optical illusion which is a two-dimensional drawing which may be perceived either as a drawing of a staircase leading from left to right downwards or the same staircase only turned upside down, a classical example of perspective ...

  3. Workin' On a Groovy Thing (song) - Wikipedia

    en.wikipedia.org/wiki/Workin'_On_a_Groovy_Thing...

    "Workin' On a Groovy Thing" is a song written by Neil Sedaka and Roger Atkins which had its highest profile as a 1969 hit single by the 5th Dimension. The song was first recorded by R&B songstress Patti Drew for her 1968 album Workin' on a Groovy Thing and released as a single to reach #34 on the U.S. R&B chart while crossing-over to #62 on the ...

  4. Julian Beever - Wikipedia

    en.wikipedia.org/wiki/Julian_Beever

    Julian Beever (born c. 1959) is a British sidewalk chalk artist [1] who has been creating trompe-l'œil chalk drawings on pavement surfaces since the mid-1990s. He uses a projection technique called anamorphosis to create the illusion of three dimensions when viewed from the correct angle.

  5. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The Hollow-Face illusion is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face. Hybrid image: A Hybrid image is an optical illusion developed at MIT in which an image can be interpreted in one of two different ways depending on viewing distance. Illusory contours

  6. Tim Rowett - Wikipedia

    en.wikipedia.org/wiki/Tim_Rowett

    Rowett has presented videos on the YouTube channel Grand Illusions since 2008. In each video, he light heartedly demonstrates and reacts to at least one toy, puzzle, or optical illusion which is either part of his collection or will be stocked through an online toy store, run as part of the Grand Illusions brand (to which he is a director).

  7. Jastrow illusion - Wikipedia

    en.wikipedia.org/wiki/Jastrow_illusion

    This optical illusion is known under different names: Ring-Segment illusion, Jastrow illusion, Wundt area illusion or Wundt-Jastrow illusion. [2] The illusion also occurs in the real world. The two toy railway tracks pictured are identical, although the lower one appears to be larger. There are three competing theories on how this illusion ...

  8. Grid illusion - Wikipedia

    en.wikipedia.org/wiki/Grid_illusion

    An example of the scintillating grid illusion. Dark dots seem to appear and disappear at intersections. The scintillating grid illusion is an optical illusion, discovered by E. and B. Lingelbach and M. Schrauf in 1994. [2] It is often considered a variation of the Hermann grid illusion but possesses different properties. [2] [3]

  9. Workin' on a Groovy Thing - Wikipedia

    en.wikipedia.org/wiki/Workin'_on_a_Groovy_Thing

    Workin' on a Groovy Thing may refer to: "Workin' On a Groovy Thing" (song), a 1968 song written by Neil Sedaka; Workin' on a Groovy Thing (Patti Drew album), 1968;