Weather School: Why is the sky blue?

Weather School: Why is the sky blue?

AUGUSTA, GA (WFXG) - It's the age old question that everyone asks at least once in their life: why is the sky blue? A quick experiment explains how it works.

Start with a clear glass filled about two thirds full with water. Next, drop in a bar of soap. White soap is preferred because the water needs to have a milky white look. Swish the soap around in the water to get that milky white look.

Next, grab a flashlight and turn off the lights. Shine the flashlight into the glass from the side. The milky white water suddenly turns blue.

This is a lot like how it works in the sky.

Sunlight and light from the flashlight are actually made up of all of the colors of the rainbow.

Small particles in the glass and particles in the atmosphere cause each color to scatter at a different rate.

Shorter wavelength blue light is scattered more than longer wavelength red. So, by the time the light reaches our eyes, the sky appears blue.

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