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Question
Why are polarized sunglasses are effective?
Answer:
If it weren't for the fact that surfaces that produce glare have a tendency to absorb vertically polarized light and reflect horizontally polarized light polarized sunglasses would have no advantage over un-polarized sunglasses.
Examples of pure and impure soectrum
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how to use instruments like Vernier calipers and micro screw gauge to measure round objects
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