Dear 100 Hour Board, Why is the sky blue?
Dear Mark, If you really want to know, there is a great explanation at http://www.why-is-the-sky-blue.org/why-is-the-sky-blue.html. – fan of “Orange Colored Sky” Dear Mark, When light from the sun comes zipping through the earth’s atmosphere oxygen and nitrogen molecules cause it to scatter in all directions. All colors of light scatter through the atmosphere but blue light scatters more than the rest because of its shorter wavelength. Once the blue light has scattered through the whole sky that’s what you see. Actually, violet has the shortest wavelength of all colors and it’s scattered even more than blue light. However, our eyes are much more sensitive to blue than violet especially if you’re color blind like me, therefore we see the sky as blue. So, then why is the sky red at sunset? Well, once the sun is at a lower angle in the sky its light has to travel farther through the atmosphere to reach you. Once it reaches you dust, gases, and pollution have scattered the blues and greens
