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Τι (ποιος) είναι L band (infrared) - ορισμός
L band (infrared)
REGION OF THE INFRARED ELECTROMAGNETIC SPECTRUM USED IN ASTRONOMY (CENTERED ON 3.45 ΜM)
In infrared astronomy, the L band is an atmospheric transmission window centred on 3.5 micrometres (in the mid-infrared).
infrared
![Active-infrared night vision: the camera illuminates the scene at infrared wavelengths invisible to the [[human eye]]. Despite a dark back-lit scene, active-infrared night vision delivers identifying details, as seen on the display monitor.](https://commons.wikimedia.org/wiki/Special:FilePath/Active-Infrared-Night-Vision.jpg?width=200 "Active-infrared night vision: the camera illuminates the scene at infrared wavelengths invisible to the [[human eye]]. Despite a dark back-lit scene, active-infrared night vision delivers identifying details, as seen on the display monitor.")
![Infrared light from the [[LED]] of a [[remote control]] as recorded by a digital camera](https://commons.wikimedia.org/wiki/Special:FilePath/Blue infrared light.jpg?width=200 "Infrared light from the [[LED]] of a [[remote control]] as recorded by a digital camera")
![[[Beta Pictoris]] with its planet Beta Pictoris b, the light-blue dot off-center, as seen in infrared. It combines two images, the inner disc is at 3.6 μm.](https://commons.wikimedia.org/wiki/Special:FilePath/ESO - Beta Pictoris planet finally imaged (by).jpg?width=200 "[[Beta Pictoris]] with its planet Beta Pictoris b, the light-blue dot off-center, as seen in infrared. It combines two images, the inner disc is at 3.6 μm.")
![Materials with higher [[emissivity]] appear closer to their true temperature than materials that reflect more of their different-temperature surroundings. In this thermal image, the more reflective ceramic cylinder, reflecting the cooler surroundings, appears to be colder than its cubic container (made of more emissive silicon carbide), while in fact, they have the same temperature.](https://commons.wikimedia.org/wiki/Special:FilePath/Effect of emissivity on apparent temperature.jpg?width=200 "Materials with higher [[emissivity]] appear closer to their true temperature than materials that reflect more of their different-temperature surroundings. In this thermal image, the more reflective ceramic cylinder, reflecting the cooler surroundings, appears to be colder than its cubic container (made of more emissive silicon carbide), while in fact, they have the same temperature.")
![The [[greenhouse effect]] with molecules of methane, water, and carbon dioxide re-radiating solar heat](https://commons.wikimedia.org/wiki/Special:FilePath/Greenhouse-effect-t2.svg?width=200 "The [[greenhouse effect]] with molecules of methane, water, and carbon dioxide re-radiating solar heat")
![hair salons]], c. 2010s](https://commons.wikimedia.org/wiki/Special:FilePath/Hooded dryer for infrared hair drying at hair salon - shown from three perspectives.jpg?width=200 "hair salons]], c. 2010s")
![An infrared reflectogram of ''[[Mona Lisa]]'' by [[Leonardo da Vinci]]](https://commons.wikimedia.org/wiki/Special:FilePath/Infrared reflectograms of Mona Lisa.jpg?width=200 "An infrared reflectogram of ''[[Mona Lisa]]'' by [[Leonardo da Vinci]]")
![IR satellite picture of cumulonimbus clouds over the [[Great Plains]] of the United States.](https://commons.wikimedia.org/wiki/Special:FilePath/NOAA Shares First Infrared Imagery from GOES-17 (43904870711).gif?width=200 "IR satellite picture of cumulonimbus clouds over the [[Great Plains]] of the United States.")
![Thermography helped to determine the temperature profile of the [[Space Shuttle thermal protection system]] during re-entry.](https://commons.wikimedia.org/wiki/Special:FilePath/STS-3 infrared on reentry.jpg?width=200 "Thermography helped to determine the temperature profile of the [[Space Shuttle thermal protection system]] during re-entry.")
![false-color]] infrared space telescope image has blue, green and red corresponding to 3.4, 4.6, and 12 [[μm]] wavelengths, respectively.](https://commons.wikimedia.org/wiki/Special:FilePath/Wide-field Infrared Survey Explorer first-light image.jpg?width=200 "false-color]] infrared space telescope image has blue, green and red corresponding to 3.4, 4.6, and 12 [[μm]] wavelengths, respectively.")
ELECTROMAGNETIC RADIATION WITH LONGER WAVELENGTHS THAN THOSE OF VISIBLE LIGHT
Infra-red radiation; Infra-red; Infrared radiation; Near-infrared; Infrared Radiation; Infrared light; Near infrared; Infra-red light; Near Infrared; 1550 nm; LWIR; MWIR; Infra red; Infared; 1300 nm; Infrared spectrum; Infra Red; Infra-Red; InfraRed; Infrared sources; Long-wave infrared; Line of light; Infrared communication; Calorific rays; Calorific Rays; Mid-infrared; Infrared rays; Thermal infrared; Infra-red reflectography; Infrared reflectography; Infrared Rays; Infrared Ray; IR-A; IR-B; IR-C; IR radiation; NIR Photons; MIR photons; Short-wavelength infrared; Infrared bands; Short-wave infrared; Mid-wave infrared; Near-infrared light; Mid infrared; 830 nm; 850 nm; Thermal infrared radiation; Applications of infrared radiation; History of infrared science; Infrared source
<electronics> (IR) Electromagnetic waves in the frequency
range just below visible light corresponding to radiated heat.
IR waves can be generated by a kind of LED and are often
used for remote controls for televisions etc. and in some
docking stations.
(1997-01-30)
infrared
ELECTROMAGNETIC RADIATION WITH LONGER WAVELENGTHS THAN THOSE OF VISIBLE LIGHT
Infra-red radiation; Infra-red; Infrared radiation; Near-infrared; Infrared Radiation; Infrared light; Near infrared; Infra-red light; Near Infrared; 1550 nm; LWIR; MWIR; Infra red; Infared; 1300 nm; Infrared spectrum; Infra Red; Infra-Red; InfraRed; Infrared sources; Long-wave infrared; Line of light; Infrared communication; Calorific rays; Calorific Rays; Mid-infrared; Infrared rays; Thermal infrared; Infra-red reflectography; Infrared reflectography; Infrared Rays; Infrared Ray; IR-A; IR-B; IR-C; IR radiation; NIR Photons; MIR photons; Short-wavelength infrared; Infrared bands; Short-wave infrared; Mid-wave infrared; Near-infrared light; Mid infrared; 830 nm; 850 nm; Thermal infrared radiation; Applications of infrared radiation; History of infrared science; Infrared source
also infra-red
1.
Infrared radiation is similar to light but has a longer wavelength, so we cannot see it without special equipment.
ADJ: ADJ n
2.
Infrared equipment detects infrared radiation.
...searching with infra-red scanners for weapons and artillery.
ADJ: ADJ n
Βικιπαίδεια
L band (infrared)
In infrared astronomy, the L band is an atmospheric transmission window centred on 3.5 micrometres (in the mid-infrared).
