Is it possible to have a large magnifiingglass with mirrors and stuff to burn something miles away?
413884
im not sure that'd be cool
367001
Buy a magnifying glass.
598668
I've seen somebody got about 400 ºC using little pieces of mirrors over a parabolic structure. Sun light was concentrated in one point
259893
It cant be just any piece of glass, it has to be a prism. The light comes out in the form of a rainbow because the prism separates the light into it's visible colors.
761501
If nothing else,you can use this but I am not positive.  "A telescope can refract images."
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.
461739
Theoretically, yes, but practically, no.  A mirror absorbs a small percentage of the light it receives, reflecting the rest.  After many levels of reflection, the light will fade out.
8756
Unless the reflective surface is perfect (which is impossible in the real world) the light will loose a little energy with each reflection (the mirror will heat up a little), and in a very short time the light will just get redder until it is merged into whatever infrared energy is inside the sphere.
717458
OK, your question and your statement don't really add up.  However to influence someone's brain from a distance is possible.  Using ULF (Ultra Low Frequency) emissions, you could render your target slightly insane for short periods of time.
1056339
There are a few items you will need:-\n1) A source of high voltage (to exicte the gas in your laser to emit photons). A readily availible item to do this would be the ballast (transformer) in a flourescent tube. This should get you up to between 700 to 1700 volts. It is preferabe if you have a supply closer to the upper end. This is dangerous so be sure to use appropriate precautions when working with high voltages.\n2) Choose the type of gas to excite. Gases to use include Carbon dioxide, helium, argon, neon, krypton - depending on the frequency you want from the laser. A nice big ruby could be used to make a really cool ruby laser - I could never afford to buy one though.\n3) build a laser tube - or better buy one from ebay. If you have glass blowing skills and make can make your own electrodes and embed them in the glass tube and make partial reflective mirrors on the end or the tube you can make one - but it's really tricky.\n4) fill your lser tube with the gas/gases you choose under reduced pressure.\n5) connect the electrodes to your power supply\n6) power it up....\nIt's as easy as that... uses the same basic principle to a flourescent tube, except that all the light from the partial reflector window is in phase.\n\nFor more detail I suggest you google something like "home made laser"
353533
If you could find a transition between an inverted state and a ground state of 1 joule, you could probably make a laser of that frequency. At this point, hard gamma rays are the limit we have done.
976726
It depends on the length of the mirrors.
116040
Im afraid my eyes arent good enuf to see that far... Its an unaswerable question
94568
If you live in AZ (possibly other states), The Magnifying Store. If not, try ebay.
168848
practuce in frony of a mirror
40709
A large glass marble will do the same thing as the magnifying glass, And it is easier to carry around while camping / hiking. (or while your deployed)
941040
I believe the light bulb would light up the sphere, like a lamp shade, You'd see the light but not the light bulb. The metal particles that are in a one sided mirror allow some light to come through.