T he sky isn't just blue by chance. I t takes all the colors of the rainbow for us to see it that ... That's because blue and violet light have the shortest, smallest wavelengths.

White light ... a rainbow of colors. Rainbows are partly the result of sunlight refraction through a rain drop, which acts like a prism. So, if sunlight is ‘white’, why is the sky blue?

An iridescent rainbow-colored cloud seemed to magically materialize in the sky above Vermont. The colorful streaks across Sunday's blue sky puzzled ... horizon -- and its light is refracted ...

From UFO-like rings and whirlpools of light to rainbow clouds ... it into a bright blue blob with a fuzzy halo. This ethereal whirlpool of blue light appeared in the night sky above Alaska ...

A rainbow, cloud bow, morning glories, halo, sun dog (parhelion), or any kind of optical arc in the sky involve some form of water or ice interacting with sunlight. There are a lot of great places ...

If you’ve ever played with a prism or seen a rainbow, then you know light is made up of ... you can see the blue sky fade away to a black background as it climbs above the atmosphere.