Impossible Objects

Impossible Objects

An impossible object (also known as an impossible figure or an undecidable figure) is a type of optical illusion consisting of a two-dimensional figure which is instantly and subconsciously interpreted by the visual system as representing a projection of a three-dimensional object although it is not geometrically possible for such an object to exist (at least not in the form interpreted by the visual system).

In most cases the impossibility becomes apparent after viewing the figure for a few seconds. However, the initial impression of a 3D object remains even after it has been contradicted. There are also more subtle examples of impossible objects where the impossibility does not become apparent spontaneously and it is necessary to consciously examine the geometry of the implied object to determine that it is impossible.

Impossible objects are of interest to psychologists, mathematicians and artists without falling entirely into any one discipline.

Read more about Impossible Objects:  Notable Examples, History

Famous quotes containing the words impossible and/or objects:

    I can entertain the proposition that life is a metaphor for boxing—for one of those bouts that go on and on, round following round, jabs, missed punches, clinches, nothing determined, again the bell and again and you and your opponent so evenly matched it’s impossible not to see that your opponent is you.... Life is like boxing in many unsettling respects. But boxing is only like boxing.
    Joyce Carol Oates (b. 1938)

    I think of consciousness as a bottomless lake, whose waters seem transparent, yet into which we can clearly see but a little way. But in this water there are countless objects at different depths; and certain influences will give certain kinds of those objects an upward influence which may be intense enough and continue long enough to bring them into the upper visible layer. After the impulse ceases they commence to sink downwards.
    Charles Sanders Peirce (1839–1914)