Final answer:
Partially linearly polarized light refers to light that has a specific direction of polarization, but not all waves have the same polarization direction. It can be produced by passing light through a polarizing filter or by reflection. When light is scattered by air molecules, it becomes partially polarized.
Step-by-step explanation:
Partially linearly polarized light refers to light that has a specific direction of polarization, but not all of its waves have the same polarization direction. Polarized light can be produced by passing light through a polarizing filter or by reflection. When light is scattered by air molecules, it becomes partially polarized, meaning that it has a specific direction of polarization, but also contains other polarization directions. Multiple scattering can further complicate the polarization of scattered light.