Quantum mechanics is the branch of physics that deals with the behavior of subatomic particles, such as electrons, protons, and photons. Unlike classical physics, which describes the macroscopic world, quantum mechanics reveals that particles can exist in multiple states at once, a phenomenon known as superposition. This leads to behaviors that might seem counterintuitive, such as entanglement, where particles become linked and the state of one can instantaneously affect the state of another, regardless of distance.
