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The wagon-wheel effect (alternatively called stagecoach-wheel effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly than the true rotation, it can appear stationary, or it can appear to rotate in the opposite direction from the true rotation ...
Like the zoetrope, it used a strip of pictures placed around the inner surface of a spinning cylinder. The praxinoscope improved on the zoetrope by replacing its narrow viewing slits with an inner circle of mirrors, [ 1 ] placed so that the reflections of the pictures appeared more or less stationary in position as the wheel turned.
A replica of a Victorian zoetrope. A zoetrope is a pre-film animation device that produces the illusion of motion, by displaying a sequence of drawings or photographs showing progressive phases of that motion.
The illusion derives from the lack of visual cues for depth. For instance, as the dancer's arms move from viewer's left to right, it is possible to view her arms passing between her body and the viewer (that is, in the foreground of the picture, in which case she would be circling counterclockwise on her right foot) and it is also possible to view her arms as passing behind the dancer's body ...
The peripheral drift illusion (PDI) refers to a motion illusion generated by the presentation of a sawtooth luminance grating in the visual periphery. This illusion was first described by Faubert and Herbert (1999), although a similar effect called the "escalator illusion" was reported by Fraser and Wilcox (1979).
People get extra during the holidays, 'doing the most' to spread Christmas cheer with huge Santa Claus inflatables or massive LED light displays.
In November 2015, Del Vecho, while visiting Duke University as the parent of a first-year Duke student, explained in an interview published in the Duke student newspaper that his days are currently divided between two things: "handling the Frozen franchise" and "working up ideas for the development of Frozen 2" with the directors. [26]
Police in Horry County, South Carolina, said this week that they are searching for two missing emus that have been evading capture for months: "We are not emu-sed."