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- Leslie_cube abstract "Leslie's cube is a device used in the measurement or demonstration of the variations in thermal radiation emitted from different surfaces at the same temperature. It was devised in 1804 by John Leslie (1766–1832), a Scottish mathematician and physicist. In the version of the experiment described by John Tyndall in the late 1800s, one of the cube's vertical sides is coated with a layer of gold, another with a layer of silver, a third with a layer of copper, while the fourth side is coated with a varnish of isinglass. The cube is made from a solid block of metal with a central cavity. In use, the cavity was filled with hot water; the entire cube has essentially the same temperature as the water. The thermal detector (on the far right in the figure) showed much greater emission from the side with varnish than from any of the other three sides. In contemporary terms, the \"emissivities\" of shiny metals are low. Isinglass is an organic glue, and has a much larger emissivity than the metals. Leslie's cube is still in use to demonstrate and measure the variations in emissivities for different materials. In the figure, the false color images (\"thermographs\") of a cube at about 55 C were taken with an infrared camera; the black and white photographs are taken with an ordinary camera. The black face of the cube is highly emissive, as indicated by the reddish color of the thermograph. The mirror-like, polished face of the aluminum cube emits thermal radiation weakly, as indicated by the blue color. The reflection of the experimenter's hand is green, which corresponds to a high emissivity surface near body temperature (37 C). The photographs also show that the white painted surface is nearly as emissive as a black surface.A modern version of Leslie's Cube is part of the structure of a small earth-orbiting satellite known as FUNcube-1 and registered as a Dutch spacecraft. Launched in November 2013, it demonstrates the absorption and emission of solar radiation in space as the satellite orbits in full sunlight, eclipse and rotates around its three axes.".
- Leslie_cube thumbnail Leslie_cube.jpg?width=300.
- Leslie_cube wikiPageExternalLink books?id=HKwS7QDh5eMC&dq=draper,+john+william&source=gbs_navlinks_s.
- Leslie_cube wikiPageExternalLink ?id=Cz4IAAAAIAAJ&printsec=frontcover&dq=John+Leslie.
- Leslie_cube wikiPageExternalLink ?id=RTNMAAAAMAAJ&pg=PA230&dq=leslie+cube.
- Leslie_cube wikiPageExternalLink ?id=uBoAAAAAQAAJ&pg=PP7&dq=john+leslie+mathematics.
- Leslie_cube wikiPageID "23668054".
- Leslie_cube wikiPageLength "5865".
- Leslie_cube wikiPageOutDegree "14".
- Leslie_cube wikiPageRevisionID "706348696".
- Leslie_cube wikiPageWikiLink Black-body_radiation.
- Leslie_cube wikiPageWikiLink Category:Radiometry.
- Leslie_cube wikiPageWikiLink Emissivity.
- Leslie_cube wikiPageWikiLink FUNcube-1.
- Leslie_cube wikiPageWikiLink Isinglass.
- Leslie_cube wikiPageWikiLink John_Leslie_(physicist).
- Leslie_cube wikiPageWikiLink John_Tyndall.
- Leslie_cube wikiPageWikiLink Thermal_radiation.
- Leslie_cube wikiPageWikiLink Thermography.
- Leslie_cube wikiPageWikiLink File:FUNcube-1.jpg.
- Leslie_cube wikiPageWikiLink File:Leslie_cube.jpg.
- Leslie_cube wikiPageWikiLink File:Leslie_cube_Draper.png.
- Leslie_cube wikiPageWikiLink File:LesliesCube.png.
- Leslie_cube wikiPageWikiLinkText "Leslie cube".
- Leslie_cube wikiPageWikiLinkText "Leslie's Cube".
- Leslie_cube wikiPageUsesTemplate Template:Cite_book.
- Leslie_cube wikiPageUsesTemplate Template:Cite_journal.
- Leslie_cube subject Category:Radiometry.
- Leslie_cube hypernym Device.
- Leslie_cube type Device.
- Leslie_cube type Thermodynamic.
- Leslie_cube comment "Leslie's cube is a device used in the measurement or demonstration of the variations in thermal radiation emitted from different surfaces at the same temperature. It was devised in 1804 by John Leslie (1766–1832), a Scottish mathematician and physicist.".
- Leslie_cube label "Leslie cube".
- Leslie_cube sameAs Q900392.
- Leslie_cube sameAs Cub_de_Leslie.
- Leslie_cube sameAs Leslie-Würfel.
- Leslie_cube sameAs Cubo_de_Leslie.
- Leslie_cube sameAs Cube_de_Leslie.
- Leslie_cube sameAs Cubo_de_Leslie.
- Leslie_cube sameAs m.06zt21d.
- Leslie_cube sameAs Куб_Лесли.
- Leslie_cube sameAs Leslies_kub.
- Leslie_cube sameAs Куб_Леслі.
- Leslie_cube sameAs Q900392.
- Leslie_cube wasDerivedFrom Leslie_cube?oldid=706348696.
- Leslie_cube depiction Leslie_cube.jpg.
- Leslie_cube isPrimaryTopicOf Leslie_cube.