Das ist auch nicht schlecht:
Another thing, lighsabre blades produce no heat and the technology is 100% efficiant so the handle doesn't get hot. The arching back of the energy re-charges the sabre and only cutting through something uses energy.
Qui Gon's cutting through the blast-door showed how he could put his hand a couple inches from the blade and not get burned. The energy works like a microwave...the object gets bombarded with super high-frequencies and the molecules get disrupted and the only heat produced is that of the object being cut...because there is no convection (like a welding torch) but molecular disruption, that is why the melted metal stayed red-hot longer. Notice how micro-waved food takes longer to cool??
I must admit that I have never liked the idea of "crystals" and "focusing length" in providing a description of how a real light saber might be constructed. In physics, there seems to be only one way to build an instrument that could emit, for long periods of time, a laser light of sufficient strength that did not travel on 'ad infinitum' as laser beams do.I propose based on known physics that the only way to construct a light saber is to create and house (via electro-magnetic bottle) a Planck sized singularity (S).This black hole would provide adequate energy to power laser beams arranged around an event horizon throat (EHT).
This (EHT) could be focused so that as the lasers surrounding the gravity well would only go about a meter or two outwards and then reach the top of the focused throat, and by the strength of the small event horizon, be drawn back into the singularity housed within the body of the light saber. That way any matter that the lasers incinerate, travel up the lasers path to the throat point where burned matter and laser, both get drawn back into the mini-black hole, where the singularity is "fed". This way, you have a nearly inexhaustable supply of power for the laser(s), no laws of physics are broken in getting the laser light to "stop".And the focused throat of singularity's event horizon would provide an excellent way to have a "solid core" to act like a physical blade. Anyone will tell you, crossing two laser beams, will only result in a parasitic loss of photonic (light) transmission via refraction (photons bouncing against each other or another material.
Additionally, I would also say that the use of lasers themselves would not be efficient or logical. Young Anakin remarks on QGJ's "energy blade". It would be easier to construct a modified toroidial tesla coil on the end of an light saber apparatus. Electricity itself would radiate down the outside of the EHT. The contained electrical discharge would allow for different color blades, the sound that the "blade" makes while moving throught the air, and also the sparks generated when two energy blades are crossed. And we all know the cutting ability of electricity. heli-arc welders, lightning through a tree, plasma torches. Current technology is available to construct all portions of a light saber as I have described it... save one. the construction or capture of a planck scale singularity. science postulates that they truly exist. but we just can't make or catch one.......yet.
To answer a few questions about energy blades if you constructed one like I would love to do...
no the blades would "weigh" nothing if their position was static, but if you moved the blade, the event horizon throat would provide some sort of resistance, for good reason... you're moving a gravity well. As such, it "might" have mass / inertia to it, so that it would "feel" like it had weight.
Electrical discharges could be phased or controlled to emit only a certain band of visible em, or color of light. Any color in the spectrum from infra-red to ultra-violet "could" be constructed.
and yes, the air around us is a very poor conductor of thermal energy, so that if you did have a torodial tesla coil emitting vast amounts of energy, it is possible that the immediate vicinity around an energy blade would still be relatively cool. (4 - 5 inches away and there would be no significant transfer of thermal energy.) and that is known fact from the study of lightning strikes
Danke an Rohmer