十万个为什么·科学启蒙30篇（4）

29 / 30

已读 0 / 30 课

为什么天空在高海拔更蓝

Sunlight contains all colors, but blue light scatters more easily than red in Earth’s atmosphere.
At sea level, thick air scatters blue light multiple times, mixing it with other colors slightly.
Higher up, there is less atmosphere above you, so scattering happens less frequently.
That means more pure blue light reaches your eyes without being diluted by scattered white light.
Also, fewer dust particles and water vapor exist at altitude to diffuse the light further.
Mountaineers often notice the sky appears deeper and richer in blue near mountain peaks.
Polarized sunglasses enhance this effect by reducing glare from scattered light.
This bluer hue confirms that Rayleigh scattering depends strongly on air density.
Airplanes flying at cruising altitude see an even more intense azure sky.
The change reminds us how much our view depends on the invisible layer surrounding Earth.

听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。

Polarized sunglasses enhance this effect by reducing glare from scattered light. 偏光太阳镜通过减少散射光造成的眩光来增强这一效果。
This bluer hue confirms that Rayleigh scattering depends strongly on air density. 这种更蓝的色调证实了瑞利散射对空气密度高度敏感。
Airplanes flying at cruising altitude see an even more intense azure sky. 飞机在巡航高度飞行时，看到的天空呈现更强烈的天蓝色。

这篇中文题目最接近哪一句？为什么天空在高海拔更蓝一次学校运动会的通知一份超市购物清单

课文第一句的意思更接近？阳光包含所有颜色，但蓝光在地球大气中比红光更容易散射。今天学校放假了。请把窗户打开。

这一课主要在讲什么？（看英文标题） Why the Sky Looks Bluer at High Altitudes How to cook noodles A maths worksheet

Polarized sunglasses enhance this effect by reducing glare from scattered light.

Polarized sunglasses enhance this effect by reducing glare from scattered light.

第一版：录下来、回听、再听标准音。系统打分以后再加。

用今天的表达，自己说一句。

例子：Polarized sunglasses enhance this effect by reducing glare from scattered light.