- luminous exposure
- 光照量
Atmospheric Sciences (English-Chinese) dictionary. 2014.
luminous exposure
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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
Exposure (photography) — Underexposure redirects here. For the 2005 film by Oday Rasheed, see Underexposure (2005 film). A long exposure showing stars rotating around the southern and northern celestial poles. Credit: European Southern Observatory … Wikipedia
Luminous — Lu mi*nous, a. [L. luminosus, fr. lumen light: cf. F. lumineux. See {Luminary}, {Illuminate}.] [1913 Webster] 1. Shining; emitting or reflecting light; brilliant; bright; as, the is a luminous body; a luminous color. [1913 Webster] Fire burneth… … The Collaborative International Dictionary of English
Luminous paint — Luminous Lu mi*nous, a. [L. luminosus, fr. lumen light: cf. F. lumineux. See {Luminary}, {Illuminate}.] [1913 Webster] 1. Shining; emitting or reflecting light; brilliant; bright; as, the is a luminous body; a luminous color. [1913 Webster] Fire… … The Collaborative International Dictionary of English
Luminous paint — Luminous (or luminescent) paint exhibits luminescence. In other words, it gives off visible light through fluorescence, phosphorescence, or radioluminescence.Fluorescent paintFluorescent paint reacts to long wave ultraviolet (UV) radiation,… … Wikipedia
Exposure value — In photography, exposure value (EV) denotes all combinations of camera shutter speed and relative aperture that give the same exposure. The concept was developed in Germany in the 1950s (Ray 2000),in an attempt to simplify choosing among… … Wikipedia
luminous paint — noun : a paint containing a phosphor (as zinc sulfide activated with copper) and so able to glow in the dark either for a time after exposure to ultraviolet radiation or indefinitely by excitation with a radioactive material (as radium) if one… … Useful english dictionary
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 paint — /lumənəs ˈpeɪnt/ (say loohmuhnuhs paynt) noun paint which contains a phosphorescent compound and therefore glows after exposure to light …
Lux — For other uses, see Lux (disambiguation). A lux meter for measuring illuminances in work places. The lux (symbol: lx) is the SI unit of illuminance and luminous emittance measuring luminous power per area. It is used in photometry as a measure of … Wikipedia
Light — For other uses, see Light (disambiguation). Visible light redirects here. For other uses, see Visible light (disambiguation) … Wikipedia
