Demo 21801: Spectral Lines

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  1. Caltech's Feynman Lecture Hall
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Demo 21801: Spectral 0:03:49

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So, how did researchers go from "Newton split light with a prism" to measuring frequencies? It is not obvious how the shift of a peak (in inches on the wall) correspond to frequency. Sure we can now derive it from RSA patterns of crystals. But what was the first way to match a displacement of a spectral line to a frequency?

samtux