In science fiction, what are the differences (other than frequency) between laser weapons and maser weapons?
611279
Laser is focused light, maser is particles that are speed up to near light speeds and do damage via impoact damge, lasers damage due to intense heat.  Does this help?
439638
no.  laser is of a lower frequency and less focus so it cannot distinguish information in density required for DVD reading.
216960
They are alll electromagnetic waves.  They all have different frequencies.  Radio waves have the lowest and gamma rays have the highest.
100968
There's another kind of plasma, I think you mean what they call the fourth state of matter.\nPlasma consists of a collection of free moving electrons and ions (atoms that have lost electrons). They carry electrical currents and generate magnetic fields. Plasmas are the most common form of matter. \n\nMaybe you can get good information on how a laser produces plasma in this site:\nhttp://www.plasmas.org/technology.htm
157600
I think warp drive was used in Star Trek, while Hyper drive was used in Star Wars. Otherwise, they are equally fast and equally imaginary.
220936
Laser is used to carry info through optical fibers.\n\nIn fiber optics, transmitters primarily consist of a laser and a modulator. The laser generates the light and the modulator changes the intensity of the laser light in order to couple the data to be transmitted. In effect, the modulator either blocks or passes the laser light depending upon the data signals being fed to it.\n\nThe lasers used in fiber optic communications are similar in many ways to those used at supermarkets and lecture halls. Both types are made in a similar fashion, using semiconductor materials much like the silicon used to make most electronic IC components. However, the one big difference between them is that communications lasers do not generate visible light, but rather infrared light.
126863
The RF waves emanating from an antenna are generated by the movement of electrical charges in the antenna. Electromagnetic waves can be characterized by a wavelength and a frequency. The wavelength is the distance covered by one complete cycle of the electromagnetic wave, while the frequency is the number of electromagnetic waves passing a given point in one second. The frequency of an RF signal is usually expressed in terms of a unit called the "hertz" (abbreviated "Hz"). One Hz equals one cycle per second. One megahertz ("MHz") equals one million cycles per second.
291517
A Laser jammer uses a infra-red LEDs or laser diodes to distort the signal of the police lidar gun.\n\nA great place to find out about laser jamming products results would be to go to the websites I linked below: http://guysoflidar.com/index.html\nhttp://guysoflidar.com/radar-detector-laser-jammer-shootout-2005/laser-jammer-tests.html\nhttp://guysoflidar.com/laser-jammer-test-july-2005/index.html\nRocky Mountain Radar products do NOT work!\nhttp://www.radarjammer.com/\n\nYou can see some videos of Laser jammers and Laser stealth coating here:\nhttp://www.laserveil.com/cool%5Fvideos/
138258
try these sites: http://www.phy.ornl.gov/astrophysics/data/cf88/\n\nhttp://www.llnl.gov/science_on_lasers/07AstSpace/AS-F_Ther.html\n\nhttp://arxiv.org/abs/astro-ph/9801028\n\nI hope this helps....\n\nDon
38532
I have not worked on stellerators but the anser could be a general one.\nThere is two frequency heating in ICF (inertial confined fusion). if you know stellerators you know what i am talking about.\n\nThere is two frequency heating in ECRIS devices.\n\nWell, there are two resonances possible\n(a) ion cyclotron freq\n(b) electron cycloron freq.\n\nIt could as well be to increase the area of the resonsnt layer. Or maybe heating by inverse landau damping too.\n\nI can only give hints. I must admit, I do'nt know the answer.\n\nPlease email me if you do find an answer
1008829
The similarity is that neither works so far. \n\nThe difference is that if one creates ions of deuterium and tritium which have positive electrical charge one can confine them with a magnetic field in a device called a tokamak and heat them until they are at a temerature where fusion can occur.  The device works, sort of, but requires more energy than it produces.\n\nThe use of lasers to create fusion involves creating pellets of deuterium-tritium and zapping them with a combination of lasers to both compress and heat the pellets to create enough energy to cause fusion to occur.  This can also be theoretically accomplished using ion beams instead of lasers. Both are being experimented with.
921136
Um, not sure why you need a laser gun.  If it's to shoot things, a standard ballistic gun is more practical.  FYI, it's against international law to develop lasers weapons to shoot people.\n\nIf you mean a toy, you can always pick one up at the local toy store (see link).  You won't see the beam.  If you did, it would be dangerous.\n\nhttp://www.target.com/gp/detail.html/sr=1-4/qid=1164226650/ref=sr_1_4/602-3152398-8374206?ie=UTF8&asin=B00023C3ZU\n\n\n\nNot a satisfying answer?  OK, you can always buy this:\n\nhttp://www.engadget.com/2005/11/03/handheld-laser-gun-available-for-purchase/
651392
None of these are right. An LED wouldn't work without QM (Quantum mechanics).\nA laser is a laser because the dominant process producing light is stimulated emission (StE). LEDs are dominantly spontaneous emission (SpE). As the name suggest SpE is light that just happens, it's spontaneous. StE on the other hand requires photons to seed it, one goes in two come out. Due to this the photons from StE are more "alike" as they are modelled on each other. The key value for a laser is it's threshold. This is the value above which it is a laser, i.e. when the StE process is strong enough to overcome the loss of light in the laser.\n\nedit: sorry couldn't keep quiet, these answers are getting worse. Lasers do NOT have more power than LEDs, for the same size they have LESS power. They do however have higher spectral densities (i.e. more power per unit wavelength). They do NOT have to be collimated. The laser pointers everyone runs around with are only collimated because there is a lens on the front. The laser inside it isn't collimated at all.
623964
A LASER (Light Amplification by Stimulated Emission of Radiation) is an optical source that emits photons.\nThe verb "to lase" means "to produce coherent light" or possibly "to cut or otherwise treat with coherent light", and is a back-formation of the term laser.
159721
Infra red - used for heating\n\nMicrowaves and radar - used for cooking and, erm, for radar. :) 802.11b/g LANs, bluetooth, portable telephones, baby monitors, satellite TV, satellite communications, and a host of other devices also operate in these frequencies\n\nTV and FM radio\n\nShortwave radio\n\nAM radio\n\nAircraft and Shipping radio bands \n\nExtremely low frequency -- very long wavelengths can be used to punch small amounts of information through to a receiver in extreme conditions.  The navy had an ELF system for the purpose of giving orders to launch nukes to submarines.  This system has reportedly been abandoned.\n\nSee "sources".  First source is an introductory web page to the electromagnetic spectrum from NASA.  Second source is information on the Navy's project ELF
145371
a railgun uses two rails that are charged with opposite charges to accelerate a projectile while a coilgun uses a series of coiled electromagnets that are turned on and off to accelerate the projectile down a line of these magnets.\n\nHope this helps you answer your question!
952580
http://www.ocf.berkeley.edu/~bramall/laserhowtohtml/laser_project/laser_intro.html\n\nThat's a danged powerful one and requires machining, I don't think I'd reccomend it for a science project but there it is and should give you basic laser info.\n\nActually building a working laser is probably more than most people would be looking at doing for a science project -- using a laser for something like holography (where you can use an off-the-shelf laser) might be a better project unless you are REALLY ambitious and willing to spend either a lot of time or a lot of money on the project.\n\nBTW, there used to be some books from TAB publishers about building your own lasers from surplus parts -- but I doubt most of the parts mentioned in them are available any more.  Still, it is worth checking out the science section of your local library to see.