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Is this correct? My understanding is that wavelength affects the angle of refraction, and therefore the length of the path, and therefore the time to travel through (a triangular prism); but not the speed of light through a medium. https://twitter.com/InertialObservr/status/1154018434813849601 …
The index of refraction is defined precisely as the speed in the medium divided by c.. so they are equivalent
Hm, I read up a bit. Now thinking that the triangle prism case combines two effects, dispersion due to velocity change and dispersion due to angle (and therefore path length) change.
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