| 释义 |
scale symmetry scale symmetry[′skāl ‚sim·ə·trē] (physics) The property of certain physical systems whereby their equations of motion in classical mechanics are unchanged when the space and time variables are rescaled; for example, for a point particle moving in a plane in a potential given by a delta function at the origin, when the vector giving the particle's position r is replaced by sr and the time t is replaced by s 2 t, where s is any number. |