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Unit 4: Wave Models and Quantum Physics
Quick questions on Polarisation of light: WACE Year 12 Physics Unit 4
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What are crossed filters?Show answer
If polarised light then meets a second filter (an analyser) whose axis is parallel to the first, it passes through. If the second axis is at right angles to the first, no component of the already-polarised light lies along it, so the light is completely blocked. Rotating one filter between these positions smoothly dims the light from bright to dark, which is the standard demonstration that the light has been polarised.
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