Here’s the Problem with Lightsabers
According to Tyson, lightsabers just don’t make sense scientifically. Astrophysicist Phil Plait says, “ Maybe the name is just wrong. Maybe they just call it a lightsaber. That doesn’t mean it’s made of light .” If that were really the case, Tyson had this to say in his tweet: “ They would just pass through each other .” Star Wars creator George Lucas explains the lightsaber as a heavy sword with a laser beam.
Source: Kickstarter