Participate in expert discussion on quantum physics. Quantum physics is the mathematical description of the motion and interaction of subatomic particles. Quantum Mechanics & Field Theory. Mainstream physics only.
Quantum mechanics describes the very small microscopic world, where things behave differently from what we are used to in the macroscopic world of 'classical' objects.
One famous example is the Double-slit experiment, which demonstrates that matter and energy can display characteristics of both waves and particles.
Waves in quantum mechanics are fundamental and described mathematically by the wavefunction and the Schrödinger equation, which results in some uncertainty when calculating the exact outcome for one single particle, the outcome is therefore probabilistic in its nature.