spectrum of light

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• Spectrum — Spec trum, n.; pl. {Spectra}. [L. See {Specter}.] 1. An apparition; a specter. [Obs.] [1913 Webster] 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… …   The Collaborative International Dictionary of English

• Spectrum analysis — Spectrum Spec trum, n.; pl. {Spectra}. [L. See {Specter}.] 1. An apparition; a specter. [Obs.] [1913 Webster] 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… …   The Collaborative International Dictionary of English

• Light-dependent reactions — of photosynthesis at the thylakoid membrane See also: Light independent reactions The light dependent reactions , or light reactions, are the first stage of photosynthesis, the process by which plants capture and store energy from sunlight. In… …   Wikipedia

• Light — For other uses, see Light (disambiguation). Visible light redirects here. For other uses, see Visible light (disambiguation) …   Wikipedia

• 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

• light — light1 lightful, adj. lightfully, adv. /luyt/, n., adj., lighter, lightest, v., lighted or lit, lighting. n. 1. something that makes things visible or affords illumination: All colors depend on light. 2. Physics …   Universalium

• Light pollution — This article is about light pollution in the visible spectrum. For information on pollution in the radio spectrum, see radio spectrum pollution. This time exposure photo of New York City at night shows skyglow, one form of light pollution …   Wikipedia

• spectrum analysis — noun the use of spectroscopes to analyze spectra • Syn: ↑spectroscopy, ↑spectrometry, ↑spectroscopic analysis, ↑spectrographic analysis • Derivationally related forms: ↑spectrometric (for: ↑ …   Useful english dictionary

• light therapy — noun also light treatment : phototherapy ; especially : the use of strong light (as of 10,000 lux intensity) for the treatment of depression and gloom (as in seasonal affective disorder) * * * Med. therapeutic exposure to full spectrum artificial …   Useful english dictionary

• SPECTRUM ANALYSIS —    name given to the method of determining the composition of a body by means of the spectrum of light which it gives forth or passes through it, founded on the principle that a substance powerfully absorbs exactly the rays it radiates, and every …   The Nuttall Encyclopaedia

• light therapy — Med. therapeutic exposure to full spectrum artificial light that simulates sunlight, used to treat various conditions, as seasonal affective disorder. Also called phototherapy. * * * …   Universalium