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Our Lady of Guadalupe Bedding Sets
So if polarised light is actually pretty common outdoors, in your home and in your office – how come you didn’t notice anything special before now?
Humans perceive polarised light using “Haidinger’s brushes”, a subtle visual effect which appears like a yellow bow-tie at right angles to the polarisation angle. You may also see a bluish bow-tie at right angles to the yellow one. The effect originates within the eye itself and is not an image of a real external object, so Haidinger’s brushes usually fade in a couple of seconds as your brain processes them out. This is one of the reasons that few people notice them day-to-day, and why they have previously been fairly difficult to study.
By using LCD screens capable of constantly refreshing the effect, we were able to make the first measurements of the dynamics of Haidinger’s brushes, confirming the prediction that some individuals would perceive the orientation of the bow-tie to “flip-flop” as the polarisation angle is rotated.