A mirror plane is a plane of reflection symmetry. For the 
-plane, the corresponding symmetry
operation is 
and is equivalent to 
, where the bar denotes an improper rotation.
Mirror Plane
See also
Mirror Image, Mirror Pair, Mirror SymmetryExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Mirror Plane." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/MirrorPlane.html