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Why Is The Sky Blue?

Barring cloudy days (along with both sunsets and sunrises), the sky will usually appear to be blue. This happens because of the way certain things can manipulate light. Just as prisms can bend light to create a rainbow and a mirror can reflect light back to where it came from, some objects can scatter light. The white light from the Sun hits oxygen and nitrogen molecules that make up most of the Earth’s atmosphere and is scattered to produce all the colors. However, since the color blue has a shorter wavelength than the rest,it is scattered more.

This effect also explains the other colors that can appear in the sky. Closer to the horizon, the sky will look much paler. Here, the light has traveled through more air and has been scattered more intensively, mixing in with the other colors and losing its blue tinge. With the Sun lower in the sky, as with sunsets, the light has to travel through even more light. This scatters the blue light further, allowing the red and yellow light to travel through.

SOURCE:::: listverse.com

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