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luminous energy source

См. также в других словарях:

  • 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

  • Energy — This article is about the scalar physical quantity. For other uses, see Energy (disambiguation). Energetic redirects here. For other uses, see Energetic (disambiguation) …   Wikipedia

  • luminous paint — paint containing a phosphor that emits visible light when irradiated with ultraviolet light. [1885 90] * * *       paint that glows in the dark because it contains a phosphor, a substance that emits light for a certain length of time after… …   Universalium

  • Luminous flux — In photometry, luminous flux or luminous power is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of light emitted, in that luminous flux is adjusted to reflect the varying sensitivity of… …   Wikipedia

  • Energy conversion efficiency — Output energy is always lower than input energy …   Wikipedia

  • luminous efficiency — /lumənəs əˈfɪʃənsi/ (say loohmuhnuhs uh fishuhnsee) noun 1. (of a source) the ratio of the light emitted to the energy input, especially when expressed as lumens per watt for electric lamps. 2. (of a radiation) the ratio of the luminous flux to… …  

  • Orders of magnitude (energy) — Different orders of magnitude of natural energy production for solar, wind and geothermal versus average global consumption rate (1 W = 1 J/s) This list compares various energies in joules (J), organized by order of magnitude. List of orders of… …   Wikipedia

  • Radiant energy — Visible light (a form of radiant energy) scattered by fog in a forest. Radiant energy is the energy of electromagnetic waves.[1] The quantity of radiant energy may be calculated by integrating radiant flux (or power) with respect to time and …   Wikipedia

  • radiant energy — Synonyms and related words: contamination, curiage, decontamination, emanation, fallout, half life, highlight, illumination, irradiance, irradiancy, irradiation, light, light source, luminous energy, natural radioactivity, nuclear radiation,… …   Moby Thesaurus

  • Wireless energy transfer — or wireless power is the transmission of electrical energy from a power source to an electrical load without artificial interconnecting conductors. Wireless transmission is useful in cases where interconnecting wires are inconvenient, hazardous,… …   Wikipedia

  • Lumen —   An empirical measure of the quantity of light. It is based upon the spectral sensitivity of the photosensors in the human eye under high (daytime) light levels. Photometrically it is the luminous flux emitted with a solid angle (1 steradian) by …   Energy terms

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