geometrical object
71Field electron emission — It is requested that a diagram or diagrams be included in this article to improve its quality. For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images. Field emission (FE) (also known as field… …
72Shape — The shape (OE. sceap Eng. created thing ) of an object located in some space refers to the part of space occupied by the object as determined by its external boundary abstracting from other aspects the object may have such as its colour, content …
73Timeline of mathematics — A timeline of pure and applied mathematics history. Contents 1 Before 1000 BC 2 1st millennium BC 3 1st millennium AD 4 1000–1500 …
74colour — /kul euhr/, n., adj. v.t., v.i. Chiefly Brit. color. Usage. See or1. * * * I Aspect of any object that may be described in terms of hue, brightness, and saturation. It is associated with the visible wavelengths of electromagnetic radiation, which …
75Metaphysics — This article is about the branch of philosophy dealing with theories of existence and knowledge. For the work of Aristotle, see Metaphysics (Aristotle). For the occult field, see Metaphysics (supernatural). Philosophy …
76Moons of Neptune — Neptune (top) and Triton (bottom), three days after the Voyager 2 flyby Neptune has thirteen known moons, by far the largest of whi …
77Optical illusion — This article is about visual perception. For the Time Requiem album, see Optical Illusion (album). An optical illusion. The square A is exactly the same shade of gray as square B. See checker shadow illusion. An optical illusion (also called a… …
78Ray (optics) — Ray of light redirects here. For other uses, see Ray of light (disambiguation). In optics, a ray is an idealized narrow beam of light. Rays are used to model the propagation of light through an optical system, by dividing the real light field up… …
79Mill, John Stuart: Logic and metaphysics — J.S.Mill Logic and metaphysics John Skorupski ENLIGHTENMENT AND ROMANTICISM IN MILL’S PHILOSOPHY Mill’s importance as one of the major figures of nineteenth century politics and culture, and the current interest in him as a moral and political… …
80Alhazen — For the Moon crater, see Alhazen (crater). For the asteroid, see 59239 Alhazen. Alhazen Alhazen (Ibn al Haytham) …
