reddit

“Anyone who's ever played a videogame or watched/read ANY science fiction will probably be familiar with rail guns. The idea is simple; you have two rails running parallel to each other. You pass a charge through them (negative one way, positive the other), and thanks to the joy of physics, the resultant magnetic force runs parallel to the rails. Fleming's right hand rule, to all the physicists out there! Put something ferrous in there and bingo, the magnetic force will push it at high speed. Build a big enough system and pump enough energy into it and you can get a very long rage, very high muzzle velocity weapon.” source...