Before revision: For light and other electromagnetic radiation, the plane of polarization is spanned by the direction of propagation (Poynting vector) and either the electric vector or the magnetic vector, depending on the convention.
After revision: , also known as the plane of vibration,For light and other electromagnetic radiation, the plane of polarization is spanned by the direction of propagation (Poynting vector) and either the electric vector or the magnetic vector, depending on the convention.