"Impossible" Technologies #2: Light Swords

Light is fascinating. As a fundamental constant in our universe, it is impossible to conceive what it would be like without it. Light is not just visible light - the wavelengths which allows us to see all that’s around us. Light is heat. Light is radiation. Light is life.

If some creators of high-tech weaponry have their way, light could be condensed into a sword and used for dishing out death as well.

And maybe - in a possible future - the technology will become condensed enough to allow the u...