Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Emissivity> ?p ?o }
Showing triples 1 to 100 of
100
with 100 triples per page.
- Emissivity abstract "The emissivity of the surface of a material is its effectiveness in emitting energy as thermal radiation. Thermal radiation is light, but for objects near room temperature this light is infrared and is not visible to human eyes. The thermal radiation from very hot objects (see photograph) is easily visible to the eye. Quantitatively, emissivity is the ratio of the thermal radiation from a surface to the radiation from an ideal black surface at the same temperature as given by the Stefan–Boltzmann law. The ratio varies from 0 to 1. The surface of a black object emits thermal radiation at the rate of approximately 448 watts per square meter at room temperature (25 °C, 298.15 K); real objects with emissivities less than 1.0 emit radiation at correspondingly lower rates.Emissivities are important in several contexts:insulated windows. — Warm surfaces are usually cooled directly by air, but they also cool themselves by emitting thermal radiation. This second cooling mechanism is important for simple glass windows, which have emissivities close to the maximum possible value of 1.0. \"Low-E windows\" with transparent low emissivity coatings emit less thermal radiation than ordinary windows. In winter, these coatings can halve the rate at which a window loses heat compared to an uncoated glass window.solar heat collectors. — Similarly, solar heat collectors lose heat by emitting thermal radiation. Advanced solar collectors incorporate selective surfaces that have very low emissivities. These collectors waste very little of the solar energy through emission of thermal radiation.planetary temperatures. — The planets are solar thermal collectors on a large scale. The temperature of a planet's surface is determined by the balance between the heat absorbed by the planet from sunlight, heat emitted from its core, and thermal radiation emitted back into space. Emissivity of a planet is determined by the nature of its surface and atmosphere.temperature measurements. — Pyrometers and infrared cameras are instruments used to measure the temperature of an object by using its thermal radiation; no actual contact with the object is needed. The calibration of these instruments involves the emissivity of the surface that's being measured.↑ ↑ ↑ ↑ ↑ ↑".
- Emissivity thumbnail Blacksmith_at_work02.jpg?width=300.
- Emissivity wikiPageExternalLink www.spectralemissivity.com.
- Emissivity wikiPageID "902820".
- Emissivity wikiPageLength "16534".
- Emissivity wikiPageOutDegree "49".
- Emissivity wikiPageRevisionID "706694532".
- Emissivity wikiPageWikiLink Absorptance.
- Emissivity wikiPageWikiLink Albedo.
- Emissivity wikiPageWikiLink Aluminium_foil.
- Emissivity wikiPageWikiLink Anodizing.
- Emissivity wikiPageWikiLink Asphalt.
- Emissivity wikiPageWikiLink Black_body.
- Emissivity wikiPageWikiLink Bolometer.
- Emissivity wikiPageWikiLink Category:Heat_transfer.
- Emissivity wikiPageWikiLink Category:Physical_quantities.
- Emissivity wikiPageWikiLink Category:Radiometry.
- Emissivity wikiPageWikiLink Copper.
- Emissivity wikiPageWikiLink Earths_energy_budget.
- Emissivity wikiPageWikiLink Glass.
- Emissivity wikiPageWikiLink Gustav_Kirchhoff.
- Emissivity wikiPageWikiLink Ice.
- Emissivity wikiPageWikiLink Infrared.
- Emissivity wikiPageWikiLink Insulated_glazing.
- Emissivity wikiPageWikiLink Leslie_cube.
- Emissivity wikiPageWikiLink Limestone.
- Emissivity wikiPageWikiLink Low_emissivity.
- Emissivity wikiPageWikiLink Marble.
- Emissivity wikiPageWikiLink Optical_depth.
- Emissivity wikiPageWikiLink Plaster.
- Emissivity wikiPageWikiLink Pyrometer.
- Emissivity wikiPageWikiLink Radiance.
- Emissivity wikiPageWikiLink Radiant_barrier.
- Emissivity wikiPageWikiLink Radiant_exitance.
- Emissivity wikiPageWikiLink Reflectance.
- Emissivity wikiPageWikiLink Sakuma–Hattori_equation.
- Emissivity wikiPageWikiLink Selective_surface.
- Emissivity wikiPageWikiLink Silver.
- Emissivity wikiPageWikiLink Snow.
- Emissivity wikiPageWikiLink Solar_thermal_collector.
- Emissivity wikiPageWikiLink Stefan–Boltzmann_law.
- Emissivity wikiPageWikiLink Thermal_radiation.
- Emissivity wikiPageWikiLink Thermography.
- Emissivity wikiPageWikiLink Thermopile.
- Emissivity wikiPageWikiLink View_factor.
- Emissivity wikiPageWikiLink Water.
- Emissivity wikiPageWikiLink Wavelength.
- Emissivity wikiPageWikiLink Wiens_displacement_law.
- Emissivity wikiPageWikiLink File:Blacksmith_at_work02.jpg.
- Emissivity wikiPageWikiLink File:Capteur_a_tubes_sous_vide_001.JPG.
- Emissivity wikiPageWikiLink File:LesliesCube.png.
- Emissivity wikiPageWikiLinkText "Emissivity of Earth's atmosphere".
- Emissivity wikiPageWikiLinkText "Emissivity".
- Emissivity wikiPageWikiLinkText "emissivities".
- Emissivity wikiPageWikiLinkText "emissivity".
- Emissivity wikiPageWikiLinkText "emitted".
- Emissivity wikiPageWikiLinkText "gray body assumption".
- Emissivity wikiPageWikiLinkText "low-emissivity".
- Emissivity wikiPageWikiLinkText "thermal emissions".
- Emissivity wikiPageUsesTemplate Template:Cite_web.
- Emissivity wikiPageUsesTemplate Template:Convert.
- Emissivity wikiPageUsesTemplate Template:Main.
- Emissivity wikiPageUsesTemplate Template:Reflist.
- Emissivity wikiPageUsesTemplate Template:SI_radiometry_units.
- Emissivity subject Category:Heat_transfer.
- Emissivity subject Category:Physical_quantities.
- Emissivity subject Category:Radiometry.
- Emissivity type Electrodynamic.
- Emissivity comment "The emissivity of the surface of a material is its effectiveness in emitting energy as thermal radiation. Thermal radiation is light, but for objects near room temperature this light is infrared and is not visible to human eyes. The thermal radiation from very hot objects (see photograph) is easily visible to the eye.".
- Emissivity label "Emissivity".
- Emissivity sameAs Q899670.
- Emissivity sameAs Emissiwiteit.
- Emissivity sameAs انبعاثية.
- Emissivity sameAs Emissivitat.
- Emissivity sameAs Emisivita.
- Emissivity sameAs Emissionsgrad.
- Emissivity sameAs Emisividad.
- Emissivity sameAs قابلیت_انتشار.
- Emissivity sameAs Emissiivisyys.
- Emissivity sameAs Émissivité.
- Emissivity sameAs אמיסיביות.
- Emissivity sameAs Emisivitas.
- Emissivity sameAs Emissività.
- Emissivity sameAs 放射率.
- Emissivity sameAs Emissiviteit.
- Emissivity sameAs Emissivitet.
- Emissivity sameAs Emissivitet.
- Emissivity sameAs Zdolność_emisyjna.
- Emissivity sameAs Emissividade.
- Emissivity sameAs m.03nd0c.
- Emissivity sameAs Emisivitate.
- Emissivity sameAs Emisivita.
- Emissivity sameAs காலற்றிறன்.
- Emissivity sameAs Emisyon_(Işıma_Gücü).
- Emissivity sameAs Випромінювальна_здатність.
- Emissivity sameAs Q899670.
- Emissivity sameAs 发射率.
- Emissivity wasDerivedFrom Emissivity?oldid=706694532.
- Emissivity depiction Blacksmith_at_work02.jpg.
- Emissivity isPrimaryTopicOf Emissivity.