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Shadow Election
A shadow is a dark area where light from a light source is blocked by an Opacity (optics), opaque object. It occupies all of the three-dimensional volume behind an object with light in front of it. The cross section (geometry), cross section of a shadow is a two-dimensional silhouette, or a reverse Projection (linear algebra), projection of the object blocking the light. Point and non-point light sources A point source of light casts only a simple shadow, called an "umbra". For a non-point or "extended" source of light, the shadow is divided into the Umbra, penumbra and antumbra, umbra, penumbra, and antumbra. The wider the light source, the more blurred the shadow becomes. If two penumbras overlap, the shadows appear to attract and merge. This is known as the shadow blister effect. The outlines of the shadow zones can be found by tracing the rays of light emitted by the outermost regions of the extended light source. The umbra region does not receive any direct light from a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Looking Down From The Eiffel Tower, Paris 8 April 2007
Looking is the act of intentionally focusing visual perception on someone or something, for the purpose of obtaining information, and possibly to convey Interest (emotion), interest or another sentiment. A large number of Troponymy, troponyms exist to describe variations of looking at things, with prominent examples including the verbs "stare, gaze, gape, gawp, gawk, goggle, glare, glimpse, glance, peek, peep, peer, squint, leer, gloat, and ogle".Anne Poch Higueras and Isabel Verdaguer Clavera, "The rise of new meanings: A historical journey through English ways of ''looking at''", in Javier E. Díaz Vera, ed., ''A Changing World of Words: Studies in English Historical Lexicography, Lexicology and Semantics'', Volume 141 (2002), p. 563-572. Additional terms with nuanced meanings include viewing,Madeline H. Caviness, Madeline Harrison Caviness, ''Visualizing Women in the Middle Ages: Sight, Spectacle, and Scopic Economy'' (2001), p. 18. watching,John Mowitt, ''Sounds: The Ambient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
