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十万个为什么·科学阅读30篇(8)

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Why Is the Sky Blue?

Why Is the Sky Blue?

天空为什么是蓝色的?

  1. Sunlight looks white, but it has many colors.
  2. When light enters Earth’s air, tiny particles scatter it.
  3. Blue light waves are short and scatter more easily.
  4. They spread in all directions across the sky.
  5. Our eyes see this scattered blue light most clearly.
  6. At sunrise or sunset, light travels farther through air.
  7. Most blue light scatters away before reaching us.
  8. Then we see red, orange, and pink instead.
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