Polarization of Light – Polarisation filters and polarisation rotators

The angle α between the two polarisation filters shown here can be rotated freely.

Using a rotating wheel, we can describe linearly polarised monochromatic light as a continuous wave. The direction of polarisation can be rotated freely on the plane.
What will happen if we change the angle α of the second filter axis? Only the component of the electric field vector parallel to its axis can pass the filter. If the direction of polarisation of the incident light wave is vertical to the filter axis, the resulting field vector is exactly zero.