Light scattering by fat globules and casein micelles causes milk to appear turbid and opaque. Light scattering occurs when the wavelength of light is near the same magnitude as the particle. Skim milk appears slightly blue because casein micelles scatter the shorter wavelengths of visible light (blue) more than the red.



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So I go through a lot of skim milk, no-fat cottage cheese and Chobani non-fat greek yogurt .

Too 'bucky' for me. 
