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spaceplace.nasa.gov/blue-sky

Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Closer to the horizon, the sky fades to a lighter blue or white. The sunlight reaching us from low in the sky has passed through even more air than the sunlight reaching us from overhead.

www.sciencemadesimple.com/sky_blue.html

It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue. As you look closer to the horizon, the sky appears much paler in color. To reach you, the scattered blue light must pass through more air.

www.livescience.com/32511-why-is-the-sky-blue.html

Though the atmospheric particles scatter violet more than blue (450-nm light), the sky appears blue, because our eyes are more sensitive to blue light and because some of the violet light is ...

www.metoffice.gov.uk/.../learn-about/weather/optical-effects/why-is-the-sky-blue

The sky appears blue to the human eye as the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible. To understand why the sky is blue, we first need to understand a little bit about light.

math.ucr.edu/home/baez/physics/General/BlueSky/blue_sky.html

But the most strongly scattered indigo and violet wavelengths stimulate the red cones slightly as well as the blue, which is why these colours appear blue with an added red tinge. The net effect is that the red and green cones are stimulated about equally by the light from the sky, while the blue is stimulated more strongly.

www.quora.com/Why-is-the-sky-blue

The answer taught in classrooms is: the sky is blue because blue is a short wavelength and air molecules scatter short wavelengths of light better than long wavelengths. Violet has a shorter wavelength than blue, but our eyes aren’t very sensitive...

www.youtube.com/watch?v=ssEfeAhwjcM

"Why the sky is blue while the clouds aren’t?”, “Why is the sun yellow?” and “Why does it turn reddish orange during sunrise and sunset?” These questions might look difficult to answer ...

www.forbes.com/.../2017/09/08/why-the-sky-is-blue-according-to-science

When the Sun is high in the sky, this is why the entire sky is blue. It appears a brighter blue the farther away from the Sun you look, because there's more atmosphere to see (and therefore more ...

science.howstuffworks.com/nature/climate-weather/atmospheric/sky.htm

If you've ever wondered why, like Irving Berlin, you see "nothing but blue skies," you're in good company. It took many centuries and a lot of smart people -- including Aristotle, Isaac Newton, Thomas Young, James Clerk Maxwell and Hermann von Helmholtz -- to puzzle out the answer, in part because the solution encompasses so many components: the colors in sunlight, the angle at w...