# 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.Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.

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