Final answer:
Unpolarized light is filtered by a polarizer to align the electric field oscillations in a specific direction. Another polarizer is used to block polarized light that is not aligned with its axis.
Step-by-step explanation:
Polarization refers to the orientation of oscillations in waves, such as light or electromagnetic waves. It describes the alignment of electric field vectors in a specific direction. Polarization plays a crucial role in optics, communication, and various technologies, affecting how waves interact with materials and devices.
When unpolarized light passes through a polarizer with a vertical plane, it allows light with vertical oscillations to pass through and blocks light with oscillations in other directions. This process polarizes the light, which means it aligns the electric field oscillations in a specific direction. The polarized light then passes through another polarizer, which has a specific axis, and only light that is aligned with the axis is transmitted, while light perpendicular to the axis is blocked.