leveling refraction

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• reciprocal leveling — Survey. leveling between two widely separated points in which observations are made in both directions to eliminate the effects of atmospheric refraction and the curvature of the earth. * * * …   Universalium

• reciprocal leveling — Survey. leveling between two widely separated points in which observations are made in both directions to eliminate the effects of atmospheric refraction and the curvature of the earth …   Useful english dictionary

• Photonics — Refraction of waves of photons (light) by a prism The science of photonics[1] includes the generation, emission, transmission, modulation, signal processing, switching …   Wikipedia

• Levelling — For other uses, see Levelling (disambiguation). Single levelling redirects here. For other uses, see Single level (disambiguation). Levelling or leveling is a branch of surveying, the object of which is 1) To find the elevation of a given point… …   Wikipedia

• surveying — /seuhr vay ing/, n. 1. the science or scientific method of making surveys of land. 2. the occupation of one who makes land surveys. 3. the act of one who surveys: The surveying required nearly two days. [1425 75; late ME: act of examining… …   Universalium

• surface coating — ▪ chemistry Introduction       any mixture of film forming materials plus pigments, solvents, and other additives, which, when applied to a surface and cured or dried, yields a thin film that is functional and often decorative. Surface coatings… …   Universalium

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• earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake …   Universalium

• Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …   Wikipedia

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• Robert Smithson — (January 2, 1938–July 20, 1973) was an American artist famous for his land art.Background and educationSmithson was born in Passaic, New Jersey and studied painting and drawing in New York City at the Art Students League of New York. CareerEarly… …   Wikipedia