Interesting Rainbow Facts


20 votes - 95%
33
1. The only reason "indigo" was included on the rainbow was so there would be 7 colors to match the 7 notes on the Western musical scale.
4
2. It is possible to see a rainbow at night.
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3. The rainbow tree sheds its outer bark to reveal bright splashes of green, orange and purple beneath.
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4. Quaternary rainbows (four rainbows at once) are possible, but are exceedingly rare and hard to see.
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5. A fire rainbow is one of the rarest of all naturally-occurring atmospheric phenomena — it looks like a cloud made of rainbows.

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