Hello there. Today I was thinking about getting a polarising filter, but suddenly a wave crashed in my brain, dropping the metaphorical penny into the conscious mind. As it so happens, 3D glasses also contain polarising filters as lenses.
And, so I mustered my practical abilities and duelled with the plastic frames to retrieve a fully-functioning filter. Although I did not extend my ingenuity to actually mounting the filter.
Interestingly, polarizing is used to orient bees when they direct other bees to nectar. And if you have vertically orient silver-plated nanoparticles suspended in water, you have yourself an invisibility cloak.
