Linked from
The 14 pages that link to Linear polarization, each with the reason it gives.
Optical activityNarrower topic: Optical activity is defined by the changing direction of this state.
PolarimetryBroader topic: Its orientation is one of the simplest polarimetric quantities to measure.
Brewster angleNarrower topic: The reflected beam at the Brewster angle is linearly polarized.
PolarizerBroader topic: The transmission axis of a common polarizer selects one linear orientation.
Malus' lawBroader topic: The incident light in the law has a definite polarization axis.