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Ch30 - Chapter 30 Reflection and Refraction The nature of...

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Chapter 30: Reflection and Refraction The nature of light Speed of light (in vacuum) c = 2.99792458 x 10 8 m/s measured but it is now the definition
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Michelson’s 1878 Rotating Mirror Experiment Picture credit German American physicist A.A. Michelson realized, on putting together Foucault’s apparatus, that he could redesign it for much greater accuracy. Instead of Foucault's 60 feet to the far mirror, Michelson used 2,000 feet.. Using this method, Michelson was able to calculate c = 299,792 km/s 20 times more accurate than Foucault Accepted as the most accurate measurement of c for the next 40 years.
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