Fizikos terminų žodynas : lietuvių, anglų, prancūzų, vokiečių ir rusų kalbomis. – Vilnius : Mokslo ir enciklopedijų leidybos institutas. Vilius Palenskis, Vytautas Valiukėnas, Valerijonas Žalkauskas, Pranas Juozas Žilinskas. 2007.
Luminous efficacy — is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power. Depending on context, the power can be either the radiant flux of the source s output, or it can be the total electric power consumed by… … Wikipedia
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
Spectrum analysis — also known as Emission Spectrochemical Analysis is the original scientific method of charting and analyzing the chemical properties of matter and gases by looking at the bands in their optical spectrum. The empirical laws of spectrum analysis are … Wikipedia
luminous flux — n radiant flux in the visible wavelength range usu. expressed in lumens instead of watts called also light flux * * * the rate of flow of radiant energy, specifically that of the visible spectrum; its SI unit is the lumen … Medical dictionary
Luminous intensity — In photometry, luminous intensity is a measure of the wavelength weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye.… … Wikipedia
Luminous energy — In photometry, luminous energy is the perceived energy of light. This is sometimes also called the quantity of light.Luminous energy is not the same as the radiant energy, the corresponding objective physical quantity. This is because the human… … Wikipedia
Luminous infrared galaxy — A luminous infrared galaxy (LIRG), is a galactic body whose defining characteristic is in emitting more than 1011 solar luminosities in the far infrared part of the electromagnetic spectrum. A more luminous system, emitting more than 1012 solar… … Wikipedia
luminous rays — rays of the visible spectrum (see under spectrum) … Medical dictionary
luminous energy — noun The radiant energy of the visible portion of a spectrum of light … Wiktionary
