Anonymous ID: 7cbf0f Nov. 9, 2018, 9:45 p.m. No.3829714   🗄️.is 🔗kun

>>3829694

Right idea, but it's the red (longer wavelength, lower frequency) that's getting filtered out by the atmosphere, and more of the blue (shorter wavelength, higher frequency) gets through, that's why you see that blue light when you look up at the sky.