Light that is polarized in one direction _ that is, the light waves are vibrating in the same plane _ is reflected strongly by a mirrorlike structure in the eye, while light whose plane of polarization is rotated by 90 degrees is barely reflected at all.
22.
In the case of linear polarization . it is often useful to add the relative orientation of that plane, perpendicular to the direction of travel, in which the oscillation occurs, such as " horizontal " for instance, if the plane of polarization is parallel to the ground.
23.
This is what our article on Faraday says-" In 1845, he discovered the phenomenon that he named diamagnetism, and what is now called the Faraday effect : The plane of polarization of linearly polarized light propagated through a material medium can be rotated by the application of an external magnetic field aligned in the propagation direction.
