How to make a laser.?
154116
First off, you probably don't have the resources to make a decent pen laser.  This kind of thing is something a big company with nice machinery can mass produce.  Still, the info below might be of use.\n\n"Easy" instructions for making a laser (from parts): http://van.hep.uiuc.edu/Van/qa/section/Light_and_Sound/Lasers/939927573.htm\n\n"Hard" instructions for making a laser (from scratch): http://repairfaq.ece.drexel.edu/sam/lasercon.htm\n\nBurning paper for fun will be more easily accomplished with a magnifying glass and the sun.  If you want something really cool, try building an ion ray gun (yes, they are real).  You can turn on florescent lights by shooting them, among other fun things.  http://www.amazing1.com/ion-gun.htm\n\nAll of these except the "easy" laser gun are serious endeavors and will require substantial effort on your part.  At the very least, you should know how to use a schematic and how to solder.
408213
Ok. Try This.....\n\nStart with a clear glass or plastic jar, some stripped wire, a strip of aluminum foil, and a larger piece of aluminum foil. \n \nBend the wire over the top of the jar so that it goes over the middle and is wrapped around the opening of the jar. Now fold the aluminum foil strip over and drop it over the wire, so that it hangs down into the jar.  \n\nNext take the larger piece of aluminum foil: make it roughly circular by cutting or folding the corners underneath, and press it over the top of the jar. Next wrap electrical tape (or any tape) over the edges of the aluminum foil holding it to the jar. Finally smooth out any bumps in the foil. \n \nYour electroscope should look something like this. \n \nComb your hair a few times and hold the comb close to the top of the electroscope. The ends of the aluminum foil should push away from each other because of electric charge. \n \nYou can discharge the scope with your hand while holding the comb close to the top of the scope. \n \nMove your hand away. \n \nMove the comb away. \n \nA charge has been induced into the electroscope. When you were discharging the scope charge remained close to the comb and when you moved the comb away that charge was released to spread through the rest of the metal parts including the aluminum strip. \n\nHope this helps.
265230
dust\nDon't use a mirror to look at a laser. don't use anything to look at a laser unless you know what you are doing. not even one of those 'meeting pointers'. it could very easily damage your eye and cause blindness. don't even shine a laser at an object that is not intended to receive laser energy. you could crash a plane or hurt or kill someone else.
649519
Yes.   Many lasers are pumped with incoherent light.   The first laser ever made was a synthetic ruby cylinder about as big as a pencil with a mirror at one end and a half-silvered mirror at the other.   A xenon tube, like a photographer's flash tube, is wound round the cylinder.   Incoherent light from the xenon tube pumps the laser and a coherent beam of red light emerges from the half-silvered end.
338253
To get a good start, try www.howstuffworks.com.\nLook in the back of a textbook to see where the editors got their information.\nFind out which companies develop/research chemical lasers then look at their websites.
747931
The simplest cheapest way to split a laser is with a plate of glass. Shine a laser through it and some with reflect, and some will transmit. Usually most transmits, but you can control the percentage that reflects by rotating the plate until the angle between the laser and the plate is very small. You can get a 50-50 split that way.
176740
http://www.industriallasers.net/?source=google&gclid=CMSW1ePGhIQCFRIbIgod9QqTeQ
1125786
melt the wax ,, pour into a square mold... when set.. cut to desired size with electric knife..
1168286
Solid-state lasers have lasing material distributed in a solid matrix (such as the ruby or neodymium:yttrium-aluminum garnet "Yag" lasers). The neodymium-Yag laser emits infrared light at 1,064 nanometers (nm). A nanometer is 1x10-9 meters. \n\nGas lasers (helium and helium-neon, HeNe, are the most common gas lasers) have a primary output of visible red light. CO2 lasers emit energy in the far-infrared, and are used for cutting hard materials. \n\nExcimer lasers (the name is derived from the terms excited and dimers) use reactive gases, such as chlorine and fluorine, mixed with inert gases such as argon, krypton or xenon. When electrically stimulated, a pseudo molecule (dimer) is produced. When lased, the dimer produces light in the ultraviolet range. \n\nDye lasers use complex organic dyes, such as rhodamine 6G, in liquid solution or suspension as lasing media. They are tunable over a broad range of wavelengths. \n\nSemiconductor lasers, sometimes called diode lasers, are not solid-state lasers. These electronic devices are generally very small and use low power. They may be built into larger arrays, such as the writing source in some laser printers or CD players\n\nthe final result\nso with the optical frequencies of 10^14 Hz the distance travelled will be around 10,000 kms with a loss as low as 0.16db/km and a repeater at that distance
708353
Hmm. . its pretty rare stuff so you are not going to hand out samples\nSince it was once used in lasers you could start your presentation with a laser light show, or just a simple laser pointer\nPresent the information chronologically, show how and why it was discovered (it started as a blank square on the Periodic Table of the Elelments) talk about it uses and why it was replaced\ngood luck
200313
http://spaceplace.nasa.gov/en/kids/laser/index.shtml
943816
i want to make a system that gets mounter to the passenger front bumber of my car, so when im stuck in traffic and some _hole feel he deserves to drive in the emergency lane, the laser will burst a hole in his tire, and give him a reason to be in the emergency lane.  Some issues with this system is the timing of when to fire the laser, how much power the laser would be.  You dont want to accidentally fire at the wrong thing, so these issues must be addressed first.  I think thats pretty innovative.\n\nwhilst working on my M.E. senior design project, my sponsor (an artist) wanted to make a dynamic hologram depicting a full COLOR rainbow..  Yeah, I know...  It made for great jokes the entire year.
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
372137
try this :\n\nhttp://www.makezine.com/blog/archive/2005/06/
996396
Yes, but it would be expensive to build the equipment and incredibly dangerous - imagine if the laser was hit by a small bit of space debris and the laser light moved - it would be like dropping a fire-bomb.  \n\nFar better to harvest the natural sunlight when it reaches the earth!
495218
well, the easiest way to do it would be to gut it, then disassemble an actual lazer tag gun, and fit the components into the airsoft gun.\n\nyou can check out  www.howstuffworks.com  and see how the lazer tag guns work, then maybe you can buy the parts at a radioshack, or other electronics dealer.
114130
It has been years since I have made transformers, but look up Stangenes Industries in Mountain View, California.  They may help directly or know who can.  I was building YaG laser power supplies with some custom trigger transformers.  They reverse engineered one for me and it worked great.  They are high integrity and really do a good job.