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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.
A spinning rectangular thaumatrope with the alternating letters of the name "Victoria" on each side, showed the full word with the letters at two different distances from the observer's eye. If the two strings of the thaumatrope are attached to the same side of the card the thickness of the card accounts for a small difference in the distances ...
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 ...
An afterimage or ghost image is a visual illusion that refers to an image continuing to appear in one's vision after the exposure to the original image has ceased. Afterimage on empty shape (also known as color dove illusion) This type of illusions is designed to exploit graphical similarities. Ambiguous image
Stroboscopic effect is one of the particular temporal light artefacts.In common lighting applications, the stroboscopic effect is an unwanted effect which may become visible if a person is looking at a moving or rotating object which is illuminated by a time-modulated light source.
Impressions of several natural phenomena and the principles of some optical toys have been attributed to persistence of vision. In 1768, Patrick D'Arcy recognised the effect in "the luminous ring that we see by turning a torch quickly, the fire wheels in the fireworks, the flattened spindle shape we see in a vibrating cord, the continuous circle we see in a cogwheel that turns with speed". [8]
Spider in a web. Spiders have woven their way into the mystical traditions and spiritual beliefs across cultures for centuries. These eight-legged architects of the natural world hold deep ...
A traditional depiction of the chariot vision, based on the description in Ezekiel, with an opan on the left side. The ophanim (Hebrew: אוֹפַנִּים ʼōp̄annīm, ' wheels '; singular: אוֹפָן ʼōp̄ān), alternatively spelled auphanim or ofanim, and also called galgalim (Hebrew: גַּלְגַּלִּים galgallīm, ' spheres, wheels, whirlwinds '; singular: גַּלְגַּל ...