Why is sky blue in colour?

A lot of other smart people have, too. And it took a long time to figure it out! blue sky and clouds illustration. The light from the sun looks white. But it is really made up of all the colors of the rainbow. A prism separates white light into the colors of the rainbow. read more

The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air. However, much of the shorter wavelength light is absorbed by the gas molecules. read more

The three different types of colour receptors in the retina of the human eye respond most strongly to red, green and blue wavelengths, giving us our colour vision. Tyndall Effect. The first steps towards correctly explaining the colour of the sky were taken by John Tyndall in 1859. read more

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. read more