In physics, resonance is a phenomenon in which a system is forced to oscillate at a specific frequency. This can happen when the system is driven by an external force, or when it’s natural frequency matches the driving force. When resonance occurs, the system experiences amplified vibrations and can become unstable.
There are many examples of resonance in nature, from pendulums swinging back and forth to earthquakes that cause buildings to collapse. In each case, the resonant frequency of the system amplifies the vibrations until they reach a point where they’re too much for the system to handle.
While resonance can be destructive, it can also be harnessed for good. Engineers often use resonance to create powerful vibrational energy, like in ultrasound machines and musical instruments. By understanding how resonance works, we can better control its power and avoid its dangers.