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The spinning dancer is a kinetic, bistable optical illusion resembling a rotating female dancer. The Spinning Dancer, also known as the Silhouette Illusion, is a kinetic, bistable, animated optical illusion originally distributed as a GIF animation showing a silhouette of a pirouetting female dancer.
A throbber animation like that seen on many websites when a blocking action is being performed in the background. A throbber, also known as a loading icon, is an animated graphical control element used to show that a computer program is performing an action in the background (such as downloading content, conducting intensive calculations or communicating with an external device).
The spinning pinwheel is a type of progress indicator and a variation of the mouse pointer used in Apple's macOS to indicate that an application is busy. [ 1 ] Officially, the macOS Human Interface Guidelines refer to it as the spinning wait cursor , [ 2 ] but it is also known by other names.
It replaced the zoetrope's narrow viewing slits with an inner circle of mirrors that intermittently reflected the images. [51] Soon after the zoetrope became popular, the flip book was introduced in 1868. With its simplicity and compactness, along with its more tactile qualities, the flip book has stayed relatively popular.
The phénakistiscope usually comes in the form of a spinning cardboard disc attached vertically to a handle. Arrayed radially around the disc's center is a series of pictures showing sequential phases of the animation. Small rectangular apertures are spaced evenly around the rim of the disc.
Travel site Lonely Planet named Toulouse the best city to visit in 2025, but I found the French city felt like an underwhelming college town.
They also showed that illusory motion reversal occurs with non-uniform and non-periodic stimuli (for example, a spinning belt of sandpaper), which also cannot be compatible with discrete sampling. Kline and Eagleman proposed instead that the effect results from a "motion during-effect", meaning that a motion after-effect becomes superimposed on ...
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