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十万个为什么·科学阅读30篇(5)

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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 holds many colors.
  2. When sunlight enters Earth’s air, it hits tiny particles.
  3. Blue light has short waves and bounces more easily.
  4. It spreads all over the sky in every direction.
  5. Our eyes see this scattered blue light most strongly.
  6. At sunset, sunlight travels through more air.
  7. Most blue light scatters away before reaching us.
  8. So we see red, orange, and pink instead.
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