What is the difference between unpolarised and polarised light?
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How can light be polarised?
Unpolarised light is passed through a polarising filter to produce polarised light.
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Why can't sound be polarised?
Sound is a longitudinal wave.
Only transverse waves can be polarised.
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What happens when unpolarised light is passed through two polarising filters at 90° to each other?
No light can pass through.
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