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A catoptric cistula is a box with insides made of mirrors so as to distort images of objects put into the box. Checker shadow illusion: The checker shadow illusion shows that when a shadow is cast onto a checked board, the colours of squares A and B in the photos appear to be different, when in fact they are the same. Chubb illusion
A pub quiz team in England. A pub quiz is a quiz held in a pub or bar. ... (without tell-tale lettering), famous places or objects captured from a strange angle ...
Some objects, such as IC 167, [6] are simply ordinary spiral galaxies viewed from an unusual angle. Other objects, such as UGC 10770 , are interacting pairs of galaxies with tidal tails that look similar to spiral arms.
A stereoscope presents 2D images of the same object from slightly different angles to the left eye and the right eye, allowing the viewer to reconstruct the original object via binocular disparity. When viewed with the proper vergence, an autostereogram does the same, the binocular disparity existing in adjacent parts of the repeating 2D patterns.
These objects included stairs that always ascend, or cubes where the back meets the front. Such works were popularized by the artist M. C. Escher and the mathematician Roger Penrose. Although referred to as "impossible objects", such objects as the Necker cube and the Penrose triangle can be sculpted in 3-D by using anamorphic illusion. When ...
The 12-sided object is one of just 33 known to exist in Roman Britain, and one of approximately 130 in the world.
The tribar/triangle appears to be a solid object, made of three straight beams of square cross-section which meet pairwise at right angles at the vertices of the triangle they form. The beams may be broken, forming cubes or cuboids. This combination of properties cannot be realized by any three-dimensional object in ordinary Euclidean space.
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