This would imply that the circle's negative radius causes the circle to "fold in on itself" so-to-speak into a negative dimension below the circle's two. This raises the question of negative dimensions... Theories?
Infrared Light sword
Instead of using a dangerous and high-energy material like plasma, I think it may be possible to make and infrared light sword using easier and cheaper materials. First of all, some infrared laser frequencies produces photons that can cut through substances, so all you...