&sq=&lang=&file=File:Question_book-new.svg){kind=small} | This article needs additional citations for verification. (January 2012) |
In the physical sciences, relaxation usually means the return of a perturbed system into equilibrium. Each relaxation process can be categorized by a relaxation time τ. The simplest theoretical description of relaxation as function of time t is an exponential law exp(−t/τ) (exponential decay).