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十万个为什么·科学阅读30篇(7)

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How Do Rainbows Form?

How Do Rainbows Form?

彩虹是怎么形成的?

  1. Rainbows happen when sunlight meets raindrops.
  2. Light enters a raindrop and bends slightly.
  3. Inside the drop, light splits into seven colors.
  4. Red bends least; violet bends most.
  5. The light bounces off the back of the drop.
  6. It bends again as it leaves the drop.
  7. Many drops together make a full rainbow arc.
  8. You see rainbows only when your back is to the sun.
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