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不知同学们夸夸其谈的时候,有没有被长辈责备“不知天高地厚”?是不是心里还有些不服气呢?现在QQ博士就告诉大家到底天有多高,地有多厚。前苏联9位科学家曾在1989年乘气球对天空颜色作了一次详细的观测。当他们从地面上升到8.5千米的高空时,天空一直是青色的;上升到10.8千米的高空时,天空成了暗青色;超过18千米高空之后,由于空气非常稀薄,光不发生散射,天空成了一片暗黑色,这时太阳和星星同辉。由此可见,青天离地面距离只有10千米左右。
I do not know when the students boasted, have they been blamed by their elders for “do not know the height of the sky?” Isn’t it still unconvincing? Now Dr. QQ tells you exactly how high the sky is and how thick it is. In the 1989, nine scientists of the former Soviet Union made a detailed observation of the color of the sky with a balloon. When they rise from the ground to an altitude of 8.5 kilometers, the sky is always blue; when it rises to a height of 10.8 kilometers, the sky becomes dark blue; after an altitude of more than 18 kilometers, the light does not scatter because the air is very thin. The sky became a dark black, when the sun and the stars shine. It can be seen that Qingtian is only about 10 kilometers away from the ground.