The shorter wavelength light, blue, can make it through the gaps, so to speak, that the longer wavelengths cannot.
IIRC, the above is exactly backwards. The shorter wavelengths, being shorter, are interfered with more and scattered a lot while the longer wave lengths wiggle through and are not scattered.
This results in the whole sky appearing to radiate the blue but only the sun radiating the rest. When there is a lot of atmosphere to get through during sunrise and sunset there is more scattering of even the longer wavelengths. Then we get red, yellow, orange over a wider area.
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