十万个为什么·科学阅读30篇(3)
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How Do Rainbows Form?
彩虹是怎么形成的?
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Rainbows appear after rain when the sun shines.雨后阳光出现时,天空中会出现彩虹。
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Sunlight is made of many colors mixed together.阳光由多种颜色混合而成。
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Raindrops act like tiny prisms in the sky.雨滴在空中像微小的棱镜。
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They bend and split sunlight into colors.它们使阳光弯曲并分解成各种颜色。
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Red bends the least, violet bends the most.红色偏折最小,紫色偏折最大。
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We see the colors in a curved band.我们看到的颜色呈弧形色带。
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You can only see a rainbow from behind you.你只能从身后看到彩虹。
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The sun must be at your back.太阳必须位于你的背后。