Alternating polarizer

An alternating polarizer, or polarizing orb, was a type of magnetic device used to energize metal blaster projectiles known as quarrels in bowcasters. A bowcaster contained a positive-default and negative-default alternating polarizer, along with a conductive bowstring, balanced on each end of the weapon. The polarizing orbs would charge a quarrel and envelope it in energy before firing a destructive blaster bolt from the barrel of the bowcaster, boosting its power with a magnetic field.

Appearances

 * Star Wars: Episode III Revenge of the Sith
 * Star Wars: Episode IV A New Hope
 * Star Wars: Episode V The Empire Strikes Back
 * Star Wars: Episode VI Return of the Jedi
 * Star Wars: Episode VII The Force Awakens