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Physics Behind The Lightsaber Can it become true


Being all curious and debating what the blade is made out of is like figuring out how the bullet will kill someone before you find out how to fire it.You need to start with the casing, needs to be made of something we don't have yet.Then you need to consider whats inside of it. If I am not mistaken the key to the whole thing is the crystal. That when cut properly, Crystals of specific material can potentially limit the length and ferocity of the blade.Moving onto my third observation.The power source, as far as I know is a self cycling energy cell. Not expending any charge because the blade rapidly collapses back and forth being pushed and pulled around coiling found near the top of the actual hilt. (due to a small gravitational development caused from the actual coil (No clue how it happens, but this is what I hear))and the only way to lose any kind of charge is to contact the blade with a solid object.So I think the thought of it being made, is not impossible, just very unlikely with our current element's.Perhaps one day when we hit up some other planets for resources we will stumble across what we need to make them. : /-reply by Idea's Idea's Idea's


hack lightsaber

Physics Behind The Lightsaber


How about just using a plasma cutter with that ThinkGeek green lazer synched to turn on when the plasma cutter does?



Physics Behind The Lightsaber


Basically A lightsaber would have to be a made out of plasma, with an intense magnetic field holding it in place, this would repel other such fields, meaning you could have sword fights with them, not sure about the reflecting blaster shots though


-reply by dude


lightsabersPhysics Behind The Lightsaber

all we need is somthing that gangenerate very intence waves of lighth along side with a mag feild that can stop arch light


physics of a plasma swordPhysics Behind The Lightsaber

If you want to read how the light saber was envisioned, go here http://forums.xisto.com/no_longer_exists/ iGuest said if there was a way to cycle the energy into a loop(like the lightsaber in star wars was envisioned) back into the batteries, then provided you had a battery with enough power to begin with, it could be doable. Also on that page is an article about archaic light sabers, which were attached via power cable to a large battery pack that the wielder would wear. Lightsabers are able to block other lightsabers thanks to the magnetic fields used to contain and direct the swords energy, because the two opposing fields would repel each other. But most other objects don't have any kind of field to repel it, which is why you can cut a person in half with it like a hot knife through butter.The only limit to its cutting power would be the density of the material and the time it took for the blade to reduce it to vapor, which is why it takes some time to cut through a door.The problem with laser weapons would be reflective properties of some materials; fire a laser at the wrong object and it'll shoot back and kill you. Plasma bolts on the other hand would stick to and burn through the target. More effective, and has a wider impact radius then a thin laser. Of course they also have a much more limited range but considering most military fire fights take place within a hundred yards its really not an issue. It would have multiple uses as well; fire several plasma globs right onto the muzzle of a tank and watch it blow itself up as melted steel obstructs the outgoing shell. Would be effective at setting fire to buildings as well in an urban situation to force the enemy into open ground.

Demon Knight Raziel


Replying to iGuest

Afterlooking at a recent news article where the study of a phenominon calledball lightning has turned into the development of Plasma bolt basedweapons which could potentialy shoot plasma bolts of size from 1 to 35cm in diameter at upwards of 200 m/s and sustain for an (alreadydo-able 1-2 seconds)They were looking at useing magnetic fields tofurther stabilize them for a longer period of time.

Based offthat article and the fact that there is a strong possibility that wemay see such blasters in a decade or so (2 my guess), Theelectromagnetic fields used to stabilize the plasma blasts would alsobe repelled by a lightsaber assuming the lightsaber used a similarfield to stabilize its plasma blade. Its all about plasma and which hasthe stronger magnetic field at the time and which has the most force.Inactuality the plasma would never touch if the magnetic field werestrong enough and the closer they get to eachother the stronger therepulsion that effects them both.((==========================))((***************************)--------]((***************************)--------]((==========================))

Surethe heat would do the cutting but the magnetic field would to thereflecting and so forth. Though I'm not quite sure of the ramificationsof useing it against metal weapons... Attracting unknown paper clipsfrom all sides and so forth... On the other hand it may attract bulletsand incinerate them in mid air as another level of protection. Metalbelts would be a no no. That and glasses... Or... Metal onces...


Lightsaber in lifePhysics Behind The LightsaberWell after researching necessary components, your typical plasmaic blade could be confined by electromagnetic fields allowing structure to contain itself. If to blades collided the fields would repel each other with possible static electricity back and forth. Its heat is the only thing that keeps the human from wielding such a weapon. If I can somehow withstand a 350 degree atmospheric temperature within proximity of 5 feet and not get burnt, I can wield such a weapon.Another key part of a lightsaber is the activation. Its ionization process is more complicated than electric current into gas. A nuclear reaction must take place to ionize the gas even partially, therefore the chamber in which the ionization took place must be very confined to prevent any damage from exposure. Its a hard process and interesting. I will develop more as I uncover it.-reply by Jordan Weber


physics behind a light saberPhysics Behind The Lightsaber

Another key part of a lightsaber is the activation. Its ionizationProcess is more complicated than electric current into gas. A nuclearReaction must take place to ionize the gas even partially, thereforeThe chamber in which the ionization took place must be very confined toPrevent any damage from exposure

I think that it's time for an actual physicist to comment here.

 It is not necessarily true that you need a nuclear reaction to ionize gas.  I have done this several times way back when I was an undergraduate in physics ad it has been done many times before and since.  All you need to do is build something called a Farnsworth machine.  This machine is essentially a fusion reactor.

 Here is the basic gist of the thing: 

You have two concentric spherical meshes of a high temp resistant material, I used tungsten. These two meshes are set into a vacuum chamber ad the interior sphere is brought to a large negative potential relative to the outer mesh, I used around 20 kV.  Then a small amount of a simple gas is bled into the chamber and the charge is brought up, I used deuterium since tritium is difficult to acquire without a great deal of nuclear regulatory crap.  This high potential difference will strip the electrons off of the gas and ionizes it.  There is some other stuff that happens after this but the explanation of it is beyond the necessary scope of this writing.

 Ionized gas aside, lightsabers are technologically possible.  However the power requirements forbi them by virtue of the size required for a weapon to be useful ad the temperature would kill you.  Yet I would love to make one.


-reply by Patrick


what about stabbing?Physics Behind The Lightsaber

hey everyone... Me an my buddy were talkin about this today.. We had one major doubt on this... Asssuming that we develop an energy source meeting all the size and power requirements that such a sword would require, would'nt it be necessary to constrain the energy(in whatever form) at the "top" of the blade? if so, how would the weilder stab his target? can anyone think of a solution for this??

-question by Roshan

Nelson Blogs

I believe that such things as lightsabers will be developed but I don't think that they will look like what the lightsabers look like the the Star Wars movies. The light sabers might look different and will probably not have the sound effects on them.The physics behind the lightsaber: you could read all of the other posts about physics and chemistry of the lightsaber or... you can just accept that the physics of the lightsaber hides in Adobe After Effects.


my idea of the lightsaber was that it was a powerful flashlight and inside the tube we all know theres a jewel in there, the jewel surronds the light and keeps it in an enclosed area, the light continues circulating the closed area and creates massive heat (hence the burns on Mace Windu when anakin chopped his arm off) 


Useless without the ForcePhysics Behind The Lightsaber

As I understand it, even if you had a light saber, you can't use it without the force.  You'd be better off developing your spiritual side and leaning to commune with the midichlorians, THEN worrying about making your light sabre


Although Han was able to use Luke's saber to cut the Tauntaun open to keep Luke warm. ( off topic but I always wondered what did Han do to survive the cold.) So as far as the story line goes the force is not necessary to use a light saber. In the books following ROTJ it is suggested that the sabers are powered by some type of crystal, ( consequentially the color of the crystal influences the color of the beam allowing Mace's purple or Leia's yellow sabers.) If nothing else we've found a common ground between Star wars fans and Trekkies... They both use Dilithium crystals lol. But seriously Plasma could be used and constrained using a magnetic field, the problem there is generating a typical magnetic field strong enough would add a lot of weight. I don't believe a diamagnetic field would be strong enough to constrict plasma but would be light enough to use in a hand held weapon. Maybe some kind of electromagnetic field would work. I have never heard anyone propose an electric solution, electricity like Tesla's death ray could theoretically produce a beam of pure energy. If you put any stock in Tesla's work the power is already present in the environment. However the heat produced kills this theory, it could produce a functioning saber but unless your hilt is 10 miles long you'd melt your hand,( and everything else), off

-reply by The Yetti



Light Sabre PhysicsPhysics Behind The Lightsaber

The physics involved are a bit more complicated than it might seem. A laser simply won't work for this as light has a tendency to travel, barring a deflective medium, of course. The only alternative would be to project a portable singularity a set distance away from the hilt of the device that would absorb the light being emitted. Such a thing, if it could even be created, would pose a grave risk to anything in its field of effect.

A plasma field, however, could be made to fit the requirements. However, the technology as it exists, is a bit subpar for this. Generating a focused plasma field involves a tremendous expenditure of energy...Too much so to be hand portable in quite the manner as would fit a swordlike device.

Containment of the field would be the next hurdle to deal with, and a magnetic "bottle" might possibly accomplish the task. Still, a means to project that "bottle" from a remote location would be the issue, and as things are, such containment fields are more easily generated surrounding the plasma, instead of projected around it from a singular point. If this hurdle can be overcome, then one could suppose that the repulsion quality of a light saber would not be generated from the plasma itself, but rather from the "bottle" used to contain it. If the field were to be compromised in some fashion (collision with another like field of the same wavelength/ properties, for example), then the contained plasma would spill out in an uncontrolled manner, necessarily being as damaging to both wielder and target.

Curiously enough, if such a containment field could be generated that met the characteristics needed for such a device, "stabbing" a target with that field might be a trivial matter. Such a containment field, really, wouldn't need to be used to contain a plasma at all, but could be more effective as the intended weapon in it's own right.

Lastly, you have the small matter of radiative effects. Fact is, a plasma field generally emits heat. A lot of heat. In order to handle such a device, you'd need to wear asbestos garments so as not to be burned to a cinder. The light emitted would also be considerably bright, perhaps even blindingly so.

Even with all this against it, it is not impossible to consider the possibility of eventually creating a "light sabre" device using plasma and an associated  magnetic bottle field. I rather doubt, though, any of us will be around to see such a development unless we live to be rather old.



<p>my idea of the lightsaber was that it was a powerful flashlight and inside the tube we all know theres a jewel in there, the jewel surronds the light and keeps it in an enclosed area, the light continues circulating the closed area and creates massive heat (hence the burns on Mace Windu when anakin chopped his arm off) </p>

This reminds of the zombie game Dead Rising 2, where you create a lightsaber by combining a jewel and torch.

Back on topic, I think the lightsaber from Star Wars was envisaged to produce actual light that has been so concentrated that it can cut through basically anything. However, the producers / storywriters probably never considered any scientific information, considering that many of the features of the lightsabers don't work in real life.

Some points / features that doesn't with scientific evidence:

- Light travels in a straight and doesn't stop until the beam of light is reflected or deflected somehow. Therefore, the fixed length feature of the lightsaber doesn't make sense scientifically.

- The light beam would have a negligible weight, so without weight, momentum in lightsaber swings would be hard to gain and fluent use of lightsaber would not achieved.

- Light beams can pass through other light beams, and would produce constructive or destructive interference. The idea of lightsabers able to block other lightsabers also doesn't make sense here.


I can't see how the physics would be possible without using some form of energy field or heat resistant reflector. Projecting a beam of light that is so intense it can cut through nearly anything would produce a constant lightwave that would simply continue travelling until it hits another surface. As far as we know, it isn't possible to control the light waves to prevent them from going any further. So really you would need an energy field projecting from the handle as well which is designed to dissapate the heat, but then the lightsaber would be useless as it would just be light trapped in a container (so to speak). I suppose you could also use a heat resistant material that travels up the inside of the beam and at the tip have some form of heat resistent reflector which bounces the light back down to the handle. This however poses the problem of, if you saber doesn't cut through an object right away you will hit the material inside the middle of the beam and maybe snap the reflector off, causing you to have more of a constant laser cannon than a sword.


You need to have a kind of confinement in order to keep the energy beam in a limited area in space.So, if two kind of this weapons are shocking one against the other one, the confinement media will stop the opponent beam, so this kind of weapon will behave during shocks exactly like the old swords behaved some hundreds of years ago.Of course, we still have to find how to create this confinement area and make it stable over a reasonable period of time, but his is the standard detail forgotten in each science-fiction tale.


Plasma-saber theoryPhysics Behind The LightsaberReplying to iGuestUsing a magnetic field is a great idea. What is you opinion of having some sort of metal rod with pores that allow plasma to flow and act as a source for the magnetic field. That way even if the field is repelled by another saber there is still a rod you can us in defense.


I don't think that understanding the works of a light sabre in term of our present technology will work. The top engineers during the golden age of stream whould have had a tough time desiging a boiler to power the space shuttle. Anything we come up with for the light sabre will just be a steampunk version.Let me suggest another angle. Since the engineers of star wars seem to have mastered gravity (artifical gravity seems to be a standard feature on all SW spacecraft) perhaps the "blade" is just a very localized, gravitationally induced disruption of space-time.


star wars isnt real people lol. lightsaber technology isnt going to be around for a long long time. they have fake lightsabers, laser pen kinda stuff. this site has a lotta that kinda stuff, even ones that burn through wood. but still not real light saber.

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