Infrared
hideInfrared (IR) radiation is electromagnetic radiation whose wavelength is longer than that of visible light (400-700 nm), but shorter than that of terahertz radiation (100 µm - 1 mm) and microwaves (~30,000 µm). Infrared radiation spans roughly three orders of magnitude (750 nm and 100 µm).
Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux, which includes infrared (47% share of the spectrum), visible (46%), and ultra-violet (only 6%) light. Bright sunlight provides luminance of approximately 100,000 candela per square meter at the Earth's surface.
For more information about Infrared, read the full article at
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News tagged with infrared light
Astronomers explore 'last blank space' on map of the Universe
Oct 28, 2009 |
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(PhysOrg.com) -- The most distant object ever discovered is described in this week's edition of the science journal Nature. Two international teams of astronomers report their observations of a gamma-ray burst ...
Cookie cutter in the sky: Seeing the shape of material around black holes for first time
Dec 16, 2008 |
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Black holes can now be thought of as donut holes. The shape of material around black holes has been seen for the first time: an analysis of over 200 active galactic nuclei—cores of galaxies powered by disks ...
Galaxy Cores to Crash in a Few Million Years
Mar 16, 2009 |
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(PhysOrg.com) -- A new image from NASA's Spitzer Space Telescope offers a rare view of an imminent collision between the cores of two merging galaxies, each powered by a black hole with millions of times the ...
NASA's Spitzer Images Out-of-This-World Galaxy
Jul 23, 2009 |
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(PhysOrg.com) -- NASA's Spitzer Space Telescope has imaged a wild creature of the dark -- a coiled galaxy with an eye-like object at its center.
In brief: A tiny, tunable well of light, and a string theorist's toolbox
Sep 21, 2009 |
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Promising photonic devices, and theorists attempt to determine whether particle physics and string theory can be reconciled.
Spitzer Reveals 'No Organics' Zone Around Pinwheel Galaxy
Jul 21, 2008 |
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(PhysOrg.com) -- The Pinwheel galaxy is gussied up in infrared light in a new picture from NASA's Spitzer Space Telescope.
Engineering new uses for gold
Aug 22, 2008 |
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The glitter of gold may hold more than just beauty, or so says a team of MIT researchers that is working on ways to use tiny gold rods to fight cancer, deliver drugs and more.
VISTA: Pioneering new survey telescope starts work
Dec 11, 2009 |
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VISTA is the latest telescope to be added to ESO's Paranal Observatory in the Atacama Desert of northern Chile. It is housed on the peak adjacent to the one hosting the ESO Very Large Telescope (VLT) and shares ...
Infrared Nanotube Films Offer Advantages for Solar Cells and More
Mar 11, 2009 |
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(PhysOrg.com) -- Researchers have already known that carbon nanotube thin films have mechanical and conductive advantages that could make them useful as electrodes in solar cells, solid state lighting, and ...
Quantum dots as midinfrared emitters
Feb 23, 2009 |
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(PhysOrg.com) -- “People are interested in the mid-infrared,” Dan Wasserman tells PhysOrg.com. Infrared light has a wavelength longer than visible light, and many molecules have numerous very strong optical resonances in the ...
The 'sci' behind the 'fi'
Dec 11, 2009 |
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As the voyagers of the Starship Enterprise boldly went to explore new worlds week after week on Star Trek, they used a host of futuristic technologies — including tricorders, holodecks, teleportation systems ...
Glowing 'Cornell dots' can show surgeons where tumors are
Nanotechnology / Bio & Medicine
Feb 19, 2009 |
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(PhysOrg.com) -- Brightly glowing nanoparticles known as "Cornell dots" are a safe, effective way to "light up" cancerous tumors so surgeons can find and remove them.
NASA's Wise Gets Ready to Survey the Whole Sky (w/ Video)
Nov 17, 2009 |
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(PhysOrg.com) -- NASA's Wide-field Infrared Survey Explorer, or Wise, is chilled out, sporting a sunshade and getting ready to roll. NASA's newest spacecraft is scheduled to roll to the pad on Friday, Nov. ...
Study on free-space optical communication shows experimental evidence of a unique atmospheric effect
Mar 17, 2009 |
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Three members of the faculty at Stevens Institute of Technology recently collaborated on a paper focusing on free-space optical communication, which appears in the latest issue of Optics Express.
If Spitzer Could Talk: An Interview with NASA's Coolest Space Telescope
Space & Earth / Space Exploration
May 05, 2009 |
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NASA's Spitzer Space Telescope is about to use its last drop of the coolant that has chilled it for the past five-and-a-half years. On about May 12, give or take a week or so, the observatory is predicted ...
