Oscillation is a fundamental concept describing a rhythmic, back-and-forth movement around a central equilibrium point. In physics, it is characterized by periodic motion where a system tends to repeat its pattern over time. Simple harmonic motion represents an idealized type of oscillation where the restoring force is directly proportional to the displacement from equilibrium, causing the system to oscillate at a natural frequency. Real-world oscillations often involve damping, which is the dissipation of energy—usually as heat—causing the amplitude of the motion to decrease over time. A crucial phenomenon related to oscillation is resonance, which occurs when an external driving force matches the natural frequency of a system, leading to a dramatic increase in the amplitude of the oscillations.