An object shows various angles of polarization in a clumpy explosion while it shows a single angle of polarization
in a bipolar explosion.
Following equation shows relation between turn angle of polarization
state and magnetic field 
Cavalleri: they had used, instead, two glasses under the angle of polarization
, where, because the reflecting planes, were at right angles, the light becomes tolerable to the eye without any other adjustment, and remains white.
One way that astronomers measure cosmic magnetic field strengths is by detecting how light from more distant quasars rotates its angle of polarization
as it travels through a region of interest, say a galaxy or galaxy cluster.
The original observations were designed to measure Faraday rotation, a well-documented effect in which intergalactic magnetic fields rotate the angle of polarization
of waves traveling through them.
For example, it may be possible to use the timing or angle of polarization
of photons to achieve an effect similar to that underlying Landauer's quantum ski lift model of a communication link.
A slight rotation in the angle of polarization
provides a direct measure of parity violation in the interaction between an electron and the quarks of the thallium nucleus.