[[File:Linear polarisationpolarization schematic.png|162px|thumb|right|Diagram of the electric field of a light wave (blue), linear-polarisedpolarized along a plane (purple line), and consisting of two orthogonal, in-phase components (red and green waves)]]
In [[electrodynamics]], '''linear polarisationpolarization''' or '''plane polarisationpolarization''' of [[electromagnetic radiation]] is a confinement of the [[electric field]] vector or [[magnetic field]] vector to a given plane along the direction of propagation. See [[Polarization (waves)|polarization]] for more information.
The orientation of a linearly polarisedpolarized electromagnetic wave is defined by the direction of the [[electric field]] vector.<ref name="Shapira,">{{cite book
