![Symmetry Operation Image source: Plus Magazine Symmetry Operation Image source: Plus Magazine](http://www.timeone.ca/wp-content/uploads/2013/03/Symmetry-Operation-e1403808806648.jpg)
Classification: concept
Chapter: Both Sides Now
A symmetry operation is just an action on something that doesn’t change the something. The simplest example, the U(1) symmetry operation, is rotating a circle through any angle. It’s still a circle.