Does gallium arsenide produce infrared diodes?
479690
In some cases, yes, depending on what other elements are combined, however a mixture of gallium arsenide is found in almost every color.
360845
Yes. those of frequency higher than infra red are absorbed by the PV. IR travels right through the silicon in the PV
154
Materials that form an inverse energy distribution?  Not quite.\n\nThere are three basic components for getting a laser to work.  First, one needs an excitation source (pumping source) such as a flashlamp, an electrical spark, etc.  Second, one needs a material (the gain medium) which can exhibit what's known as population inversion - the capacity for a material to raise the electron energy level from the lower to the upper energy states.  Nearly all materials will exhibit this behavior with some more efficiently than others.  Finally, one needs to direct the stimulated energy by using a resonator.\n\nThere are many combinations of pump sources, lasing materials and optical configurations depending on the intended use.  There are solid state (ruby, Nd:YAG), gas (nitrogen, helium-neon) and semiconductor (gallium-arsenide) lasers that come in a variety of wavelengths (colors) to choose from, again, depending on what you want to do with it.\n\nJust a little bit of background: My degree is in Physics, and I've been working in the lasers and electro-optics field for the past 10+ years.  You can see what my graduate lab at SDSU looked like at: http://www.equationlab.com/mtp/quantumblog/about.html
978132
Infra-red from either source are the same, the only variable is the wave length. For example U/V from the sun versus U/V from a tanning bulb are identical except that the tanning bulb produces U/V of a known wave length and the sun covers many wave lengths ranging from about 1,500 to 3,000 angstroms or so. Sunlight therefore produces variable wave lengths of Infra-red but the body does not. We use infra-red in medicine to determine areas of heat (infections or to indicate tumors by producing less Infra-red.)
255650
Yes.  Or at least it can by using deep level optical spectroscopy (DLOS).  See the reference below:
946840
Rod shaped? Are you referring to something like a 1N914?  \n\nThe "rod-shape" is the glass packaging.  The diode itself is only 625 micrometers thick and cannot be connected to electrically without the original metallization and bond wires.
60102
Sierra Pacific Infrared\n\nhttp://www.x20.org/
643806
As a source of infrared radiation, most modern FTIR devices use a heated ceramic element.  This usually consists of a coiled wire heater that has been coated with ceramic.
159295
Current CD-ROM players use an invisible-light infrared laser with a wavelength of 780 nanometers.\n\nHowever, as another poster mentioned, this varies especially in RW drives.
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http://www-us.semiconductors.philips.com/acrobat/datasheets/1N4001G_1.pdf
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Read this  http://www.glolab.com/pirparts/infrared.html  and you'll know.
767508
http://en.wikipedia.org/wiki/Zener_diode
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L.E.D. are light emitting diodes, which are comprised of p-n junctions.  P-N junctions are formed using semiconductive material.  P-type semiconductors are composed of positive ions (i.e. holes) and N-type semiconductors are composed of negative ions (i.e. electrons).  When a voltage is added, a current is established, flowing from P to N material.  Current flows only one way through an L.E.D.  This causes electrons and holes to interact.  When this happens, the band gap energy level of an electron decreases, causing a release of energy via a photon (i.e. a particle of light).  \n\nDepending on the semiconductive material of the diode, the released photons result in different colors of light because of different band gap energy.  Here are a few examples:\n\naluminum gallium arsenide (AlGaAs) - red and infrared\n\naluminum gallium phosphide (AlGaP) - green\n\naluminum gallium indium phosphide (AlGaInP) - high-brightness \norange-red, orange, yellow, and green\n\ngallium arsenide phosphide (GaAsP) - red, orange-red, orange, and yellow\n\ngallium phosphide (GaP) - red, yellow and green\n\n-------------\n\nHope this helps
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Advanced American Enterprises (AAE) claims that any clothing that's treated with its IR/NV-Stealth tech will become invisible to any/all night vision equipment/night observation devices (NVE/NODs) and thermal/IR sensors/viewers, as well as untargetable by IR laser designators sighting equipment (i.e. laser sights), when the wearer flips the switch to "On".   Please see attached links.
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What is a bundle of light energy that acts like a particle called?  Photon\n\n How does a flourescent light work?  An electical potential creates a plasma of a gas.  These excited gases emit light.\n\nWhat do we call light that is produced from heat?  infrared\n\nWhat are some uses of ultraviolet light?  Sterilization. Inducing chemical reactions.\n\nWhat electromagnetic waves can we see?  This is known as the visible spectrum.\n\nWhat controls the amout of infrared radiation given off of an object? Temperature\n\nWhat are infrared waves? If you book says heat, it is wrong.  Infrared is no different than any other EM wave.  It is the part of the EM spectrum that can excite vibrations in molecules.  It just so happens that the black body radiation given off from the temperatures of objects seen on earth is mostly in the IR.  \n\n How can a microwave heat your food and not your plate?  Microwave oven excite rotational levels in water.  The plate does not have water and is not heated.
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passive infrared detectors, solid-state cont actors, ultrasonic devices, and photosensitive controls at their disposal\n\n\n\nManual or automatic dimming equipment, which can respond to many inputs, allows the illumination of a space to be set at any desired level. The semiconductor used in a dimmer circuit is called a triac. The triac provides phase control, meaning that it regulates the current to the lighting load by only conducing during a selected part of the AC power cycle.\n\nIncandescent dimming devices include wall box-type units rated as high as 2,000W that can fit in a single-gang electrical device box. Some models allow dimming from two or more locations, which previously required a remotely controlled dimmer module.\n\n\n\nfor any further clarification, you can mail me
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It'd be pretty complicated, but one way might be...\n\nUse the radio waves to heat something.  Connect a heat engine between the warmed object and one at room temperature.  Use the heat engine to run a generator.  Use the generator to charge a battery, and then connect the battery to a light bulb (or laser, or some other thing that emits visible light).  Voila!\n\nAnother way you might be considering is something analogous to frequency doubling-- shine laser light of some wavelength on a crystal, and out from the other end comes laser light with double (or sometimes triple) the frequency.  This won't work with radio waves because they simply don't have enough energy.  Frequency doubling works because of nonlinear effects that take place in the crystal.  Radio waves are not energetic enough to produce nonlinear effects.