When waves of light spread out from a light source such as the sun or a lamp, the light goes out in all directions, radiating out from the source. But when some of that light hits a shiny surface that is reflective, such as a window, it bounces off and that bouncing light is largely travelling in a single direction, causing a reflection. Now that the bouncing light is lined up and travelling in this fashion, it is polarized.

So what our humble but oh so clever little polarizer does is eliminate the polarized light which is travelling in one direction, to weed it out from the general light – and hey presto, your annoying reflections are gone.


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