Physics analysis confirms Star Wars lightsaber blades possess mass
An investigation into Newton's second law and moment of inertia suggests the iconic blade is not a massless beam of light, but an object with physical weight.
A physics-based examination of Star Wars film duels has concluded that lightsaber blades must possess mass to exhibit the rotational motion and centre of mass dynamics observed on screen. This finding distinguishes the fictional weapon from massless laser beams, challenging the colloquial but physically incorrect description of the device as a "laser sword."
The analysis utilises Newton's second law of motion and the concept of moment of inertia to argue that the hacking motions seen in duels are inconsistent with massless light beams. True laser beams are theoretically invisible from the side and would pass through one another upon collision, yet the choreography in films depicts solid impacts and distinct swinging arcs.
Specific evidence cited includes the throwing of a lightsaber by Darth Vader in Return of the Jedi, where the rotation point shifts upwards into the blade. This shift indicates that the blade contributes to the centre of mass, a dynamic that would not occur if the energy field were massless and centred solely on the hilt.
The study distinguishes between mass, which is the amount of matter in an object, and weight, which is the gravitational force acting upon it. The analysis suggests that the blade's mass dictates the effort required to swing the weapon, influencing the angular acceleration and torque needed during combat.
The conclusion relies entirely on the visual depiction of motion in films, which are staged for entertainment rather than scientific accuracy. While the actual mechanism creating the blade remains unknown, the study speculates that an internal mechanism might emit a plasma field, assuming the on-screen choreography accurately reflects the fictional universe's internal logic.
