十万个为什么·科学阅读30篇(6)
4 / 30
正在确认阅读权限…
What Makes the Sky Blue?
天空为什么是蓝色的?
-
Sunlight looks white but contains all colors.阳光看似白色,实则包含所有颜色。
-
Air has tiny molecules and dust particles.空气中含有微小的分子和尘埃颗粒。
-
Blue light waves are short and scatter easily.蓝光波长短,容易散射。
-
They bounce off air particles in all directions.它们向各个方向弹离空气微粒。
-
Red light waves are longer and pass straighter.红光波长较长,传播路径更直。
-
Our eyes catch more blue light from the sky.我们的眼睛从天空中接收到更多蓝光。
-
At sunrise or sunset, light travels farther.日出或日落时,光线传播距离更远。
-
Then red and orange light scatter more instead.此时红光和橙光反而散射得更多。