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Topic: Impossible trident illusion

Related Topics

Optical illusion

Hermann grid illusion

Poggendorf Illusion

Fraser spiral illusion

Necker cube illusion

Cafe wall illusion

Penrose staircase

Illusion

Ames room

Stereogram

Penrose triangle

Moon illusion

Missing square puzzle

Phi phenomenon

Mach band

	impossible trident
		Over the years, countless adaptations of the trident have appeared with names such as the devil's fork, the three stick clevis, the blivit, the impossible columnade, the trichotometric indicator support, and, most extravagantly, the triple encabulator tuned manifold.
		Some early writers commented that the impossible trident couldn't be built in any form in three dimensions.
		In 1985, the Japanese artist Shigeo Fukuda made a 3-d model of the trident in the form of classical columns in which the illusion works – from one critical angle.
	www.daviddarling.info /encyclopedia/I/impossible_trident.html (441 words)

	Optical illusion
		Physiological illusions, such as the afterimages[?] following bright lights or adapting stimuli of prolonged alternating patterns (contingent perceptual after-effect, CAE), are the effects on the eyes or brain of prolonged stimulation of a specific type - brightness, tilt, colour, movement and so on.
		Paradox illusions offer objects that are impossible or paradoxical, such as the Penrose triangle or impossible staircase seen, for example, in the work of M.
		Fiction illusions are the perception of objects that are genuinely not there to all but a single observer, such as those induced by schizophrenia or hallucinogenic drugs.
	www.ebroadcast.com.au /lookup/encyclopedia/op/Optical_illusion.html (494 words)

	Blivet
		The blivet is an undecidable figure, an optical illusion and an impossible object.
		It was known in 1964, and one was shown on the March 1965 cover of Mad[?] magazine.
		It is also called a "two-pronged trident" and a "three-legged widget".
	www.ebroadcast.com.au /lookup/encyclopedia/im/Impossible_trident_illusion.html (41 words)

	Optical Illusions Etc: free, scary, word & picture optical illusions
		Square A is exactly the same shade of grey as square B. mirage is a natural illusion that is an optical phenomenon.
		Physiological illusions, such as the afterimages following bright lights or adapting stimuli of excessively longer alternating patterns (contingent perceptual aftereffect, CAE), are the effects on the eyes or brain of excessive stimulation of a specific type - brightness, tilt, colour, movement, and so on.
		Many are physiological illusions, such as the Cafe wall illusion which exploits the early visual system encoding for edges.
	illusionsetc.blogspot.com /2004/05/what-are-optical-illusions.html (804 words)

	Optical Illusions - Info on Impossible Trident
		It is impossible because as you look at this flat 2D picture, your brain automatically tries to build a 3D shape in your mind – and it can’t.
		This trident makes use of the fact that a drawing of a cylinder can be made using two lines, where as a rectangle takes three.
		So although throughout the trident there are only 6 lines, these can make 3 cylindrical prongs but only two rectangular ones.
	www.at-bristol.org.uk /Optical/ImpossibleTrident_more.htm (103 words)

	Optical Illusions: Seeing Is Not Believing
		At that point, some artists had unintentionally created impossible figures, but Reutersvärd was the first to realize what he had done.
		Today he is recognized as "the father of impossible figures." In the 1980s the Swedish government created a stamp to honor Reutersvärd's impossible triangle.
		When looking at an impossible figure, it is hard to see how the parts fit together as a three dimensional object.
	library.thinkquest.org /J0110336/imposs.htm (217 words)

	Impossible trident illusion - Psychology Wiki - A Wikia wiki (Site not responding. Last check: 2007-10-12)
		This blivet is reminiscent of an M.C. Escher print—it portrays two impossible perspectives at once, creating a 'lost' layer between the top two rods, and an impossible extra, vanishing rod in between the bottom two.
		Template:Wiktionary The blivet is an undecidable figure, an optical illusion and an impossible object.
		It was known in 1964, and one was shown on the March 1965 cover of Mad magazine (who dubbed it the poiuyt, derived from the last 6 letters on the top row of a typewriter keyboard, right to left), and has appeared numerous times since then.
	psychology.wikia.com /wiki/Impossible_trident_illusion (363 words)

	Is Trident a sensible way to spend Â£20 billion?
		The cost is equivalent to 800 new city academy schools, 60 medium-sized hospitals or the employment of 20,000 new NHS consultants.
		As the vessels are due for replacement between 2020 and 2025 and there can be a lead-in time of up to 14 years to develop new weaponry, a decision is due shortly on whether to replace them.
		Possibilities being mooted for a new generation of Trident include the development of multi-role submarines, which can fire both nuclear and conventional missiles, or that new Astute submarines being designed for the Royal Navy could be adapted for nuclear weapons.
	www.nuclearpolicy.org /index.cfm/page/article/id/2570 (1616 words)

	optical illusions resource page
		An optical illusion is a type of illusion characterized by visually perceived images that are deceptive or misleading [1].
		There are physiological illusions, that occur naturally, and cognitive illusions, that can be demonstrated by specific visual tricks that show particular assumptions in the human perceptual system [2].
		Paradox illusions offer objects that are paradoxical or impossible, such as the Penrose triangle or impossible staircases seen, for example, in the work of M. Escher.
	www.digitamoney.com /Olymp-to-Outer/optical_illusions.php (1360 words)

	Trident Ploughshares - Scottish Parliament Debate
		The reason for that is to deter aggression from states in possession of chemical or biological weapons or to deter rogue states.
		Just 30 miles from Glasgow, each Trident submarine carries 144 nuclear warheads, but we are told that that is a reserved matter and that Trident submarines must not be discussed.
		Trident is a disgrace and it is up to members to join together and do the decent thing: protest against it.
	www.tridentploughshares.org /events.php3/IMG/doc/article897 (3907 words)

	Why Nuclear Deterrence Is A Dangerous Illusion, by Commander Robert Green, Royal Navy (Retd) , June 1998
		This difficulty has re-emerged recently, with the deployment in Trident of a single, variable lower-yield warhead in some missiles to threaten a "more limited nuclear strike" in order to deliver, in Mr Rifkind's words, "an unmistakable message of our willingness to defend our vital interests".
		In 1980 I was a fly on the Whitehall wall when Thatcher insisted on having Trident, despite disagreement among the Chiefs of Staff and without consulting the Cabinet.
		Unfortunately, he contradicted his own wise words by supporting the replacement of Polaris by Trident; and more specifically by supervising the introduction, mentioned earlier, of a lower-yield, single warhead in the missile load of the Trident submarine currently on patrol.
	www.wagingpeace.org /articles/1998/06/00_green_deter-illusion.htm (3572 words)

	Ames Room (Site not responding. Last check: 2007-10-12)
		The first illusion is a result of looking through a special viewing point with one eye and a stationary head.
		The second illusion is that objects in the room appear to shrink or grow depending on where they move in the room.
		The angle that at which an object appears impossible is called the Ames Transformation and in this example the Ames transformation point would be the peephole.
	ahsmail.uwaterloo.ca /kin356/illusion/Ames.HTML (210 words)

	ESCHER ILLUSIONS (Site not responding. Last check: 2007-10-12)
		M.C Escher is famous for coining the development of some impossible objects.
		This triangle is an impossible object, the beams of the triangle appear to come towards and away from you at the same time.
		The triangle has areas that appear to be right or normal, but when taken as a whole object it becomes impossible.
	ahsmail.uwaterloo.ca /kin356/illusion/escher.HTML (149 words)

	Optical Illusions (Site not responding. Last check: 2007-10-12)
		We believe that we perceive things as they are, but this is an illusion!
		State-dependent bias is always present and always invisible, and so we are continually taken in by it.
		Failure to appreciate this illusion is the source of great sorrow.
	www.souldirected.com /opt_illus.html (271 words)

	« L’étude et la science s’introduisent partout, dans l’administration, dans la politique, dans la guerre, et ... (Site not responding. Last check: 2007-10-12)
		Language is shaped by culture and the expression of this culture is the language itself.
		It is impossible to distinguish the border between thought and the coding of this thought by words.
		But we know that it is impossible, in general, to translate oral jokes and puns.
	www.esperantic.org /hegemonydurand.htm (5657 words)

	Optical illusion - Wikipedia, the free encyclopedia
		Many famous artists have worked extensively with optical illusions, including M.C. Escher, Bridget Riley, Salvador Dalí, Giuseppe Arcimboldo, Marcel Duchamp, Oscar Reutersvärd, and Charles Allan Gilbert.Optical illusion is also used in film by the technique of forced perspective.
		Some visual illusions such as the Ponzo illusion and the Vertical-horizontal illusions can also occur when using an auditory-to-vision sensory substitution device.
		Renier, L., Laloyaux, C., Collignon, O., Tranduy, D., Vanlierde, A., Bruyer, R., De Volder, A.G. The Ponzo illusion using auditory substitution of vision in sighted and early blind subjects.
	en.wikipedia.org /wiki/Optical_illusion (704 words)

	Optical Illusions (Site not responding. Last check: 2007-10-12)
		These are some great illusions that we found on the net and decided to include in our pages.
		If you see any more illusions on the WWW, please let us know.
		We do not have a copyright on these illusions so if you would like to, you can copy them from us.
	www.torinfo.com /illusion/directory.html (61 words)

	M.C Escher
		In practice this is IMPOSSIBLE and yet it seems possible when you look at the picture.
		There are far too many images to keep on this web site, but there are many sites on the web which contain large numbers of his work.
		I have however compiled a selection of Optical Illusions, many of these can be drawn and reproduced quite simply, not only are they fascinating but seem to defy the laws of geometry.
	www.brew-wood.co.uk /escher/escher.htm (127 words)

	Blivet - Wikipedia, the free encyclopedia
		This blivet is reminiscent of an M.C. Escher print—it portrays two irreconciliable perspectives at once, creating a 'lost' layer between the top two rods, and an impossible extra, vanishing rod in between the bottom two.
		The blivet is an undecipherable figure, an optical illusion and an impossible object.
		It appears to have three cylindrical prongs at one end which then mysteriously transform into two rectangular prongs at the other end.
	en.wikipedia.org /wiki/Impossible_trident_illusion (501 words)

	Optical Illusions - A HUGE gallery of eye tricks!
		This is similiar to the columns illusion or the trident illusion.
		With over 180 pictures of optical illusions, from weird tattoos to free desktop wallpaper, you can learn from plenty of scary eye tricks for a school science project!
		Some optical illusions were created uniquely for this site, others are assumed to be in the public domain.
	www.coolopticalillusions.com /elephantlegs.htm (341 words)

	Links - Illusions
		Hollow plastic models of the human vocal tract turn the squawk of a duck call into vowel sounds.
		The largest collection of illusions on the Internet, many appearing for the first time.
		With optical illusions, scientific toys, visual effects, and even a little magic.
	www.ulb.ac.be /psycho/fr/docs/museum/Links/Illusion.html (477 words)

	lineshape
		Check out the illusions below and prepare to be proved wrong.
		On which face of the cube is this blue dot?
		Is it on the back face or front face of the cube?
	www.geocities.com /opticalillusionsuk/lineshape.html (505 words)

	101 Forum 1 Information
		Your eye will construct phantom spots at the cross marks of the horizontal and vertical lines.
		Known as the impossible trident, this image could not be replicated in three dimensions.
		Known as a necker cube, when this cube is perceived from one perspective, it will naturally tend to change to the other in about 3 seconds.
	www.public.asu.edu /~mdg42/101forum1info.html (141 words)

	- Beyond the Ordinary Dot Net-Eye Wonder...Pllusions
		We hope you enjoy these illusions and the links to sites where you can find out the Why and How of it.
		At this site you will find much information and many illusions to play with, including "The Moon Illusion, An Unsolved Mystery" by Donald E. Simanek and theories of what it is from a link on the page.
		And if you can not wait for the explanation of why the moon appears so large at times, go here
	www.beyondtheordinary.net /illusions.shtml (713 words)

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