Resonant cavity

A resonant cavity is a specially designed space or chamber where electromagnetic waves, like light or radio signals, bounce back and forth in a precise pattern. When these waves match the cavity's natural frequency, they reinforce each other, creating a strong, sustained signal. Think of it like pushing a swing; timing your pushes correctly makes it go higher. Resonant cavities are used in devices like lasers, microwave ovens, and particle accelerators to efficiently generate, store, or manipulate waves at specific frequencies, enhancing their performance and effectiveness.