彩虹的颜色从哪里来？
How Rainbows Get Their Colors
HowRainbowsGetTheirColors
Rainbowsaren’tmagic—they’relightscience!Whensunlighthitsraindrops,itbendsandsplitsintosevencolors:red,orange,yellow,green,blue,indigo,andviolet.Thissplittingiscalled‘dispersion’.Redlightbendstheleast;violetbendsthemost.That’swhyredalwaysappearsontheoutsideoftherainbowandvioletontheinside.Youcanonlyseearainbowwhenthesunisbehindyouandrainisinfront.Trymakingamini-rainbowwithaglassofwaterandsunlightonawhitewall—itworkslikeatinyprism!
中文翻译
彩虹不是魔法，而是光的科学！当阳光照进雨滴，就会弯曲并分解成七种颜色：红、橙、黄、绿、蓝、靛、紫。这种分解叫“色散”。红光弯曲最少，紫光最多，所以红色总在彩虹外圈，紫色在内圈。只有太阳在你身后、前方有雨时，才能看见彩虹。试试用一杯水和阳光，在白墙上制造迷你彩虹——它就像一个小小的棱镜！