^Polarisation

A wave having vibrations is only in one direction & that is normal to its direction of propagation is called a polarized wave & the phenomenon of restricting the oscillation of a wave to just one direction in a direction transverse plane or normal to its direction of propagation is called polarisation of waves. Only transverse waves can be polarized or longitudinal waves can’t be polarized. Any transverse wave can be linearly polarized in any direction perpendicular to the direction of propagation.