I had a dream about a lightsaber and how to do it

Kanigo2

Kanigo2

Quantum Scribe
Here help me on this.

We have a power source in the handle that fires a laser but the light is bent into a vortex style of pattern that radiates from the Inside (of the lightsaber beam) travels a specific distance/frequency and returns to the handle.

The very "tip of the blade" would appear to be a white hole horizon in effect but bent so hard that it turns around 180 degrees back to the source(well close to it).

In effect it would apply a vortex effect--Think of a water fountain--and the water falls back to the handle-except it would almost apply a seration/scisoring effect upon its return to the handle.


I understand that the light bending here is the issue-- Is there ANY physics that could support a light beam being tuned in this way?

I wont even go into the cooling issues in the handle yet---lets toss that to the side for the moment.


Can anyone else visualize this?
 
Can anyone else visualize this?
Click to expand...

lightsaber-1.jpg


is a sort a gravity field and the use of a 2 laser 3d grid to mark the field???

/ttiforum/images/graemlins/devil.gif
 
Hehehe-- I can see more than a few people have actually thought about it..


I was actually concerned with the actual physics that could support a concept like this.

It is generally a clean concept and I like the fact of the manner in which the feild is propagated

I am just wondering If a magnetic field would be enough to allow this vortex effect or would it actually require a different form of control to actually bend the light in such a way.

That would be one hell of a magnetic field to control this ...Like to the point that you would not want to touch it. and would be hard to maintain.

I wasnt concerned with the size of the machine either this thing can be the size of a football feild-

What I am concerned with is it possible to make a light beam travel a distance and bend around and return to the source.

Even if we used multiple beams to accomplish the same effect.
 
Kanigo,

I understand that the light bending here is the issue-- Is there ANY physics that could support a light beam being tuned in this way?
Click to expand...

Light is photons and photons are the mediating particle for electromagnetism. Light responds to E&M. Light has a relativistic mass and responds to gravitation. That's how you bend light - gravity or EM.

Your saber bends the beam 180 degrees at the tip and the radius of the arc at that point it very tiny. That's a huge problem. It's not just bending 180 degrees its doing it in a very short space.

Without going into the integral calculus we can plug in some quick and dirty numbers to see, with a much larger turning radius, what's necessary to bend light 180 degrees.

At the limb of the sun's surface (grazing incidence) light is bent ~1.7 arc seconds by the surface gravity. The sun's surface gravity is ~28 g. There are 648,000 arc seconds in 180 degrees.

648,000/1.75 = 370,285

370,285 * 28 = ~10,368,000 g

You'll need a hand-held gadget that degerates the equilavent of over ten-million Earth gravities. I think that a gravitation based light saber beam is out.


But at Cal Berkeley Dr. Xiang Zhang and a group of nano-scientists are working on electromagnetic cloaking materials. They are developing materials that bend light in order to render an object electromagnetically invisible.

The energy densities that they are working with aren't anywhere close to a laser but it does suggest that in theory it can be done.

Here's the paper:

Cloaking of Matter Waves
 
Kanigo,

I probably should have specified that the UC Berkeley team is working on a theory for EM cloaking that bends the light so that "eyes" - biological or electronic - don't receive the EM signature of the object. They haven't actually developed any cloaking materials yet. But the theory looks promising.

I forgot to mention in the original post that there is a third way to bend light and get it to return to its source...a mirror. But that's not the answer you were looking for. From the Index of Refraction of materials we know how much they bend light electromagnetically (as well as the speed of light in that material).
 
One point that stands out in the PDF.


It has been shown that an almost arbitrary potential patterns could be generated using micro magnetic traps.

So it would be doable if it was done in small arcs.

and we note that the amplitude of Vc is more than two orders of magnitude larger than the KINETIC energy of the incident atom.(understanding that requires some extreme technical challenges)



However there is NO fundamental limit for obtaining such accuracy in the optically and magnetically induced potential.


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Would anyone else care to offer up another method ?

I have a feeling this would require some Exotic material(which would not be out of the question)-- for Christs sakes Its a bloody Light saber...and that alone is worth more money than Solomons mines could generate.
 
Kanigo,

Long shot to get a reply but Timo Nieminen is a Queen Elizabeth II research fellow at Queensland University, AU - Dept. of Physics. His field of research is Biophotonics and Laser Science. He's published over 20 refereed journal articles. He's a regular poster on SPR.

Who knows, if you email him for some ideas maybe he'll asnwer.

Here;s his home page: http://www.physics.uq.edu.au/people/nieminen/nieminen.html
 
bend light and get it to return to its source...a mirror. But that's not the answer you were looking for
Click to expand...

Were you speaking of a literal 'mirror'; or something more along the lines of an ion-mirror field?

Sorry if that comes out wrong - just popped in my head...

Scalability a limiting factor here for practical utilization?
 
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