Brillouin's Theorem

Brillouin's Theorem in physics states that under certain conditions, a system's response to external influences, like disturbances or vibrations, can be understood through its natural modes of oscillation. Essentially, it means that when you apply a force, the system reacts in a predictable way based on how it naturally wants to move. This concept is important in areas like material science and engineering, as it helps predict how structures or materials behave when subjected to forces, leading to better designs and safety measures.