Resonance is a phenomenon that occurs when an object or system vibrates at its natural frequency due to an external force. This can happen in various contexts, such as in musical instruments like guitars or pianos, where specific frequencies produce rich sounds. When the frequency of the external force matches the natural frequency of the object, it amplifies the vibrations, resulting in a stronger sound. In physics, resonance can also be observed in systems like bridges or buildings, where external forces, such as wind or earthquakes, can cause them to sway. If these forces match the structure's natural frequency, it can lead to significant oscillations, potentially causing damage. Understanding resonance is crucial in engineering to ensure safety and stability.