I've been trying to find a proof or a paper that goes into calculating why the sky is blue as opposed to the "the sky is blue because of scattering" explanation that all over the internet. I (think) understand the concept but I would like to see some numbers. I'm aware of the I = 1/lambda^4 formula. But I can't use that to explain the color of the sky. Is that a water down version of what is used to explain the color of the sky? I would think we have to take the incident wavelength into account as well as the size of the particle that causing the scattering. Can anyone link me to something like this? Thanks!