Answer to Question #120816 in Physics for kashaf

Question

WHY PLANE MIRROR RESONATOR IS CALLED MARGINALLY STABLE?

Answer 1

The definition of a marginally stable system: it is a system that receives a signal of finite intensity and can amplify it infinitely, while the system continues working without breakage.

Plane mirror resonator is marginally stable because the impulses make photons reflect from the surfaces of the mirrors many times, the intensity of the radiation grows exponentially, the system still works successfully.