Definition of Spectra. Meaning of Spectra. Synonyms of Spectra

Here you will find one or more explanations in English for the word Spectra. Also in the bottom left of the page several parts of wikipedia pages related to the word Spectra and, of course, Spectra synonyms and on the right images related to the word Spectra.

Definition of Spectra

Spectra
Spectrum Spec"trum, n.; pl. Spectra. [L. See Specter.] 1. An apparition; a specter. [Obs.] 2. (Opt.) (a) The several colored and other rays of which light is composed, separated by the refraction of a prism or other means, and observed or studied either as spread out on a screen, by direct vision, by photography, or otherwise. See Illust. of Light, and Spectroscope. (b) A luminous appearance, or an image seen after the eye has been exposed to an intense light or a strongly illuminated object. When the object is colored, the image appears of the complementary color, as a green image seen after viewing a red wafer lying on white paper. Called also ocular spectrum. Absorption spectrum, the spectrum of light which has passed through a medium capable of absorbing a portion of the rays. It is characterized by dark spaces, bands, or lines. Chemical spectrum, a spectrum of rays considered solely with reference to their chemical effects, as in photography. These, in the usual photogrophic methods, have their maximum influence at and beyond the violet rays, but are not limited to this region. Chromatic spectrum, the visible colored rays of the solar spectrum, exhibiting the seven principal colors in their order, and covering the central and larger portion of the space of the whole spectrum. Continous spectrum, a spectrum not broken by bands or lines, but having the colors shaded into each other continously, as that from an incandescent solid or liquid, or a gas under high pressure. Diffraction spectrum, a spectrum produced by diffraction, as by a grating. Gaseous spectrum, the spectrum of an incandesoent gas or vapor, under moderate, or especially under very low, pressure. It is characterized by bright bands or lines. Normal spectrum, a representation of a spectrum arranged upon conventional plan adopted as standard, especially a spectrum in which the colors are spaced proportionally to their wave lengths, as when formed by a diffraction grating. Ocular spectrum. See Spectrum, 2 (b), above. Prismatic spectrum, a spectrum produced by means of a prism. Solar spectrum, the spectrum of solar light, especially as thrown upon a screen in a darkened room. It is characterized by numerous dark lines called Fraunhofer lines. Spectrum analysis, chemical analysis effected by comparison of the different relative positions and qualities of the fixed lines of spectra produced by flames in which different substances are burned or evaporated, each substance having its own characteristic system of lines. Thermal spectrum, a spectrum of rays considered solely with reference to their heating effect, especially of those rays which produce no luminous phenomena.

Meaning of Spectra from wikipedia

- Look up spectra in Wiktionary, the free dictionary. Spectra may refer to: The plural of spectrum, conditions or values that vary over a continuum, especially...
- or SPECTRA is a fully internal electronic warfare system jointly developed by Thales Group and MBDA France for the D****ault Rafale. The full SPECTRA integrated...
- Bantam Spectra is the science fiction division of American publishing company Bantam Books, which is owned by Random House. According to their website...
- Sally Spectra is a fictional character from the American soap opera The Bold and the Beautiful. Sally was pla**** by actress Darlene Conley for almost...
- Spectroscopy is the field of study that measures and interprets electromagnetic spectra. In narrower contexts, spectroscopy is the precise study of color as generalized...
- Spectra Energy Corp, headquartered in Houston, Texas, operated in three key areas of the natural gas industry: transmission and storage, distribution...
- Wikimedia Commons has media related to Kia Spectra. The Kia Spectra is a compact car produced by Kia Motors between 2000 and 2009. It took many design...
- In algebraic topology, a presheaf of spectra on a topological space X is a contravariant functor from the category of open subsets of X, where morphisms...
- Spectra Shield is a composite material (specifically, an ultra-high-molecular-weight polyethylene (UHMWPE) fiber) used in bulletproof vests and vehicle...
- Spectra Group (Bengali: স্পেকট্রা গ্রুপ) is a Bangladeshi diversified conglomerate based in Dhaka. Khan Md. Aftabuddin is the chairperson of Spectra Group...