Are those dots meant to be quantum field-values, QED photons, or the like? If so, do you mean to claim that Snell's law (or even Duarte & Piper Am. J. Phys 1982) is fully recovered by building up from quantum elements travelling at different speeds (or having different momenta)?
Red light travels faster in glass than the shorter wavelength colors, which is why a prism “splits” colors
(gif by @LucasVB)pic.twitter.com/rIG3layybW
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No, it’s just a visualization. However snells law is derived from QED
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The speed of light in glass (or in any medium) is constant and does not depend on the wavelength. The angle of refraction when the light enters the glass *does* depend on wavelength, and that's why the light splits.
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The red light, having a shorter path, will pass through the glass more quickly, but not at a higher velocity.
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Why specifically red light?
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Red light has a longer wavelength (and thus lower energy) than the other colours.
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