optical quantities

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• Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …   Wikipedia

• optical storage — ▪ technology  electronic storage medium that uses low power laser beams to record and retrieve digital (binary) data. In optical storage technology, a laser beam encodes digital data onto an optical, or laser, disk in the form of tiny pits… …   Universalium

• 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

• optical activity — Physical Chem. the ability of a substance to rotate the plane of polarization of plane polarized light. [1875 80] * * * Ability of a substance to rotate the plane of polarization of a beam of light passed through it, either as crystals or in… …   Universalium

• optical constant — noun : any of several quantities characteristic of the optical behavior of a substance (as the refractive index, absorption coefficient, or reflectivity for a specified wavelength) …   Useful english dictionary

• optical fiber — a very thin, flexible glass or plastic strand along which large quantities of information can be transmitted in the form of light pulses: used in telecommunications, medicine, and other fields. Also called light guide. Cf. fiber optics, waveguide …   Universalium

• Convolution for optical broad-beam responses in scattering media — Photon transport theories, such as the Monte Carlo method, are commonly used to model light propagation in tissue. The responses to a pencil beam incident on a scattering medium are referred to as Green’s functions or impulse responses. Photon… …   Wikipedia

• Comparison of high definition optical disc formats — This article is about comparative HD optical disc formats. For a history of the Blu ray/HD DVD format war, see High definition optical disc format war. This article compares the technical specifications of multiple high definition formats,… …   Wikipedia

• Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium

• cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …   Universalium

• astronomy — /euh stron euh mee/, n. the science that deals with the material universe beyond the earth s atmosphere. [1175 1225; ME astronomie ( < AF) < L astronomia < Gk. See ASTRO , NOMY] * * * I Science dealing with the origin, evolution, composition,… …   Universalium