"Can you build a real lightsaber?" documentary by Dr Michio Kaku

A Star Wars lightsaber doesn't have a physical blade or rod. It emits a beam of energy that goes out about three feet or so and then just stops. Light doesn't work like that. Lasers don't work like that. No form of electromagnetic energy works like that.

 

^ Exactly.

 

If you notice the tops of the lightsabers are not flat, but curved. It is obviously falling back on itself, caught in an intact cycle.
Kaku also points out the problem of light not stopping. Obviously you haven not seen the documentary, at least entirely. Kaku's lightsaber is also based on materials found on our planet. Obviously we do not have access to energy crystals perhaps found on another planet.

Kaku's lightsaber also uses an eltro-magnetic coil to keep the plasma beam intact. Neither did you watch the documentary properly nor are you commenting on it from an advanced physicists perspective.

 

"Exactly", because you clearly have not watched the documentary in full length either. He clearly discusses this problem. You repeatedly seem ignore certain aspects to suit an objective.

I also pointed out that earlier forms of the lightsaber according to Star Wars canon use different sources of power, which you also deliberately ignored and moved on, but only turned up to disagree with Kaku when it suited your objective. Not to mention you keep ignoring Kaku's a qualified physicist.

 

I'm unable to watch the video because it's apparently blocked in the U.S.

Okay, so in Star Wars canon, lightsabers emit blades of hot plasma. I stand thus corrected. However, it's still a pretty far-fetched concept.

 

It doesn't matter. Lightsabers exhibit properties that real plasma lacks, particularly with respect to the solidity of the saber beams. The canon description in Star Wars of lightsabers is technobabble, so the use of the term "plasma" in Star Wars fiction doesn't mean anything.

Yep.

 

Until you do, don't comment on it.

No. I stated earlier forms of the lightsaber were plasma based, even providing a linked illustration. But skipping that part was a necessity to push your point forward.

Who is this again? Never heard of him. Kaku on the other hand is amongst the top renowned physicists. Not only that, but the problems of the lightsaber has been addressed in Kaku. Do you seriously think he would skip all that? But ofcourse ignoring all that is necessary to make it look like he never addressed it.

 

Argument by repetition of the same statement. "I'm right, the physicist is wrong just because. He addressed the issues, but it's better to pretend he didn't. He explained in detail, but somehow he's still wrong, just because."

 

I didn't say any of that.

 

Both of you can also access the video through a proxy site.

 

Well it sure seems like that. Until you watch the documentary, you cannot hope to bring up the same points again and again, which he already discusses. You claimed to have already seen it didn't you? Can't you access it via a proxy site?

 

I already stated my opinion about his invention upthread. Quoting myself:

 

I don't think you understood that there's a telescoping ceramic rod going the length of the blade. You keep saying watch the video, but you seem to lack a basic understanding of what Kaku's design actually is.

To be clear, I never said that his design can't work. I only said what is obvious: it's not a lightsaber. But calling it a lightsaber certainly garners attention.

 

No wait, I think i caught it now. The ceramic rod is extending all the way to the end and keeping the beam intact. And actually what the other guy posted is more similar to the hypothetical crystal lightsaber. One problem he seems to have is containing the plasma.

 

Hitting anything hard with a ceramic rod isn't going to be good for the ceramic rod. That's pretty much the beginning and end of that idea for anything other than some sort of industrial welding or cutting application.

Keeping a large stable plasmoid in a toroidal shape, stretched or not, requires a huge amount of work. See polywell for the kind of work it's taken so far.

 

After re-evaluating Kaku's proposed "lightsaber" it's hard to believe, but it's true that these guys proposed lightsabers are much more realistic. Heck they even got the color options worked out:

 

What was Kaku's design at all compared to this LOL :-0