What is String Theory? | Quantum Mechanics String theory is a set of attempts to model the four known fundamental interactions - gravitation, electromagnetism, strong nuclear force, weak nuclear force - together in one theory. This tries to resolve the alleged conflict between classical physics and quantum physics by elementary units—the one classical force: gravity, and a new quantum field theory of the other three fundamental forces. According to string theory, all particles are just tiny vibr

String Theory Simplified: Understanding the Universe's Tiny Vibrating Strings | Science Documentary