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Universalium. 2010.
luminous range — Navig. the distance at which a certain light, as that of a lighthouse, is visible in clear weather, disregarding interference from obstructions and from the curvature of the earth and depending on the power of the light … Useful english dictionary
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
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 flux — noun the rate of flow of light energy • Hypernyms: ↑radiant flux * * * noun : radiant flux in the visible wavelength range usually expressed in lumens instead of watts called also light flux * * * Optics. the rate of transmission of luminous… … Useful english dictionary
luminous flux — noun Date: 1911 radiant flux in the visible wavelength range usually expressed in lumens instead of watts … New Collegiate Dictionary
geographic range — Navig. the distance at which a certain light, as that of a lighthouse, is visible to the eye at a given elevation, assuming that the weather is clear and that the light is sufficiently powerful to be visible from any point at which it appears… … Universalium
geographic range — Navig. the distance at which a certain light, as that of a lighthouse, is visible to the eye at a given elevation, assuming that the weather is clear and that the light is sufficiently powerful to be visible from any point at which it appears… … Useful english dictionary
List of most luminous stars — Below is a list of stars arranged in order of decreasing luminosity (increasing bolometric magnitude). Accurate measurement of stellar luminosities is quite difficult in practice, even when the apparent magnitude is measured accurately, for three … Wikipedia
High dynamic range — Ejemplo de fotografía HDR con mapa de tonos. HDR del municipio de … Wikipedia Español
lighthouse — /luyt hows /, n., pl. lighthouses / how ziz/. 1. a tower or other structure displaying or flashing a very bright light for the guidance of ships in avoiding dangerous areas, in following certain routes, etc. 2. either of two cylindrical metal… … Universalium
