WPolarization (waves)
WBabinet–Soleil compensator
WBirefringence
WBrewster angle microscope
WBrewster's angle
WChirality (chemistry)
WCircular polarization
WDichroism
WExtinction cross
WFresnel equations
WFresnel rhomb
WGlan–Foucault prism
WGlan–Taylor prism
WGlan–Thompson prism
WIceland spar
WDextrorotation and levorotation
WNicol prism
WNomarski prism
WOptical mineralogy
WOptical rotation
WPlane of polarization
WPockels effect
WPolarimeter
WPolarimetry
WPolarization rotator
WPolarized light pollution
WPolarizer
WPolarizing filter (photography)
WRadial polarization
WRayleigh sky model
WRochon prism
WSénarmont prism
WShear wave splitting
WSunstone (medieval)
WTransverse wave
WTwo-photon circular dichroism
WVoigt effect
WWaveplate
WWollaston prism