- luminous flux unit
- nouna measure of luminous flux per unit area• Hypernyms: ↑light unit
Useful english dictionary. 2012.
luminous flux unit
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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 density — luminous flux per unit of cross sectional area. * * * … Universalium
luminous flux density — luminous flux per unit of cross sectional area … Useful english dictionary
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
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 density — noun : the luminous energy in a beam of light passing a unit normal section per unit time called also intensity of light … Useful english dictionary
luminous flux — /lumənəs ˈflʌks/ (say loohmuhnuhs fluks) noun the rate of flow of energy of visible radiation, corrected for the spectral sensitivity of a standard observer; the derived SI unit is the lumen …
Orders of magnitude (luminous flux) — To help compare different orders of magnitude, the following list describes various lumen, which is measured in lm. Factor (lm) Multiple Value Item 10 2 1 centilumen (clm) 0.025 lm One firefly[1] 101 10 lumen (lm) 12.57 lm One candle … Wikipedia
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 intensity — n the intensity of a light source as measured by the luminous flux per unit solid angle and usu. expressed in candles * * * the light giving power of a source of light. Cf. candle power … Medical dictionary
