Source: wikibot/quasinormal-mode
= Quasinormal mode
{wiki=Quasinormal_mode}
Quasinormal modes (QNMs) are specific types of oscillatory solutions to the equations governing perturbed systems, particularly in the context of general relativity and black hole physics. They describe the response of a perturbed system, such as a black hole, after a disturbance, analogous to the normal modes of a vibrating system in engineering or classical physics, but with important differences.