# Physics

Why are some sunglasses polarized horizontally?

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1. Aviation use of sunglasses do not need to block reflections (horizontally polarized), but just block a lot of light. So any polarization is OK. Typically, they are polarized at 45 degrees, so they wont reject all the light from an LCD display, which may be horizontally or vertically polarized.

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bobpursley
2. thanks :)

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