extends to a depth of

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• Depth of field — The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry …   Wikipedia

• depth of field —    In photography, the distance between the nearest point and the farthest point in the subject which is perceived as acceptably sharp along a common image plane. For most subjects it extends one third of the distance in front of and two thirds… …   Glossary of Art Terms

• Optical depth (astrophysics) — This article is about optical depth in astrophysics. For optical depth in general, see optical depth. Contents 1 Optical Depth in Astrophysics 2 A Simple Interpretation 3 The Eddington Approximation and the Depth of the Photosphere …   Wikipedia

• Audio bit depth — In digital audio, bit depth describes the number of bits of information recorded for each sample. Bit depth directly corresponds to the resolution of each sample in a set of digital audio data. Common examples of bit depth include CD audio, which …   Wikipedia

• Fisheries glossary — This is a glossary of terms used in fisheries, fisheries management and fisheries science. A * Abundance is a measure of how many fish are in a population or a fishing ground. See relative abundance and absolute abundance.* Acoustic survey a… …   Wikipedia

• volcano — /vol kay noh/, n., pl. volcanoes, volcanos. 1. a vent in the earth s crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals. 2. a mountain or hill, usually having a cuplike crater at the summit,… …   Universalium

• tornado — tornadic /tawr nad ik, nay dik/, adj. tornadolike, adj. /tawr nay doh/, n., pl. tornadoes, tornados. 1. a localized, violently destructive windstorm occurring over land, esp. in the Middle West, and characterized by a long, funnel shaped cloud… …   Universalium

• Mining in South Africa — has been the main driving force behind the history and development of Africa s most advanced and richest economy. Large scale and profitable mining started with the discovery of a diamond on the banks of the Orange River in 1867 by Erasmus Jacobs …   Wikipedia

• Mining industry of South Africa — Premier Diamond Mine, Cullinan, Gauteng, South Africa Mining in South Africa has been the main driving force behind the history and development of Africa s most advanced and richest economy. Large scale and profitable mining started with the… …   Wikipedia

• radiation measurement — ▪ technology Introduction       technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement.       The term ionizing radiation refers to those… …   Universalium

• Structure of the Earth — Earth cutaway from core to exosphere. Left picture is not to scale. The interior structure of the Earth, similar to the outer, is layered. These layers can be defined by either their chemical or their rheological properties. The Earth has an… …   Wikipedia