Lightsaber blades are fictional, and their physical nature is not definitively explained in canon or reality, according to the analysis. [1]
The report says the common Star Wars label “laser sword” is inaccurate because laser beams do not behave like lightsaber blades. Laser beams are invisible from the side, can travel indefinitely, and do not physically collide, while lightsabers visibly clash in combat scenes. [1]
That mismatch matters for the mass question. If a lightsaber blade has mass, the blade cannot be made of pure light or other electromagnetic radiation, because light has no mass. [1]
The analysis says one way to probe the issue is to look at how lightsabers move when characters swing them. That approach could help test whether the weapon behaves like a massless beam or something with inertia. [1]
For now, the article’s conclusion is limited to the fiction: the blade’s exact physical make-up is not settled, and the laws of known physics do not cleanly fit the way lightsabers are shown on screen. [1]
