The Penrose Triangle also known as the Impossible Triangle
This is an optical illusion consisting of an object which can be depicted in a perspective drawing but cannot exist as a solid object.
The Impossible Triangle (also known as the Penrose Triangle or the Impossible Tribar) was first created by Oscar Reutersvärd (1915 - 2002), a Swedish graphic artist known as the ‘father of the impossible figure’. It is anecdotally but widely reported that he created it in 1934, aged 18 while doodling as a student in his Latin class. (www.illusionsindex.org)
The illusion was independently discovered later and popularised by Lionel Sharples Penrose (1898 -1972), a British psychiatrist, geneticist, and mathematician, and his son Sir Roger Penrose (1931 -), a British mathematician, physicist and philosopher of science. Penrose and Penrose published the illusion in the British Journal of Psychology in 1958. (www.illusionsindex.org)
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