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雨过天晴 ,天空中常常会出现一道半圆形彩虹 ,它是一条由红、橙、黄、绿、蓝、靛、紫七种颜色组成的光带 ,我们把它叫做虹 .我国古人很注重观察自然现象 ,对天空中彩虹早就有了科学的解释 .沈括在《梦溪笔谈》中引用孙彦光的话说 :“虹 ,日中雨影也 .日照雨 ,则有之 .”唐代张?
When the rain is clear, a semi-circular rainbow often appears in the sky. It is a band of light consisting of seven colors: red, orange, yellow, green, blue, black and purple. We call it rainbow. Our ancient people are very Paying attention to observing natural phenomena, it has long been a scientific explanation for the rainbow in the sky. Shen Kuo quoted Sun Yanguang in his “Meng Xi Bi Tan” and said: “The rainbow, the sun and the rain, and the sun and the rain, are there.” ?