I started thinking because I can't sleep. The blade, I mean, the hilt obviously has to weigh something.
Cause it's in the name, right? [u]Light[/u]-saber. Light doesn't weigh anything(or its mass is so little that it really doesn't matter). Then I remembered hearing that the blade is superheated plasma or something, does that have a significant weight to it?
I see Obi-Wan and Anakin fight in episode 3 and they move so fast I assume their weapons are weightless. Now Kylo Ren fights Rey in TFA, his swings look pretty heavy. Or at least it looks like he puts a little power behind them.
[i]And then[/i] I remember hearing that the blades weren't entirely special effects in the movie. They were physical and lit up about as bright as they are on-screen, on set. So maybe his swings look that way because the [i]prop[/i] is heavy-ish?
Someone help.
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Because light acts as a wave and a particle, the particle must have mass, giving it weight, no matter how minute it is. Practically, yes, in theory the blades are weightless, until they come into contact with something that slows or halts their momentum. Technically, no, they are not entirely weightless. [spoiler]I think that's how light works...[/spoiler]