【英语时差8,16】为什么有的车头灯是蓝色的？（上）

（单词翻译）

Have you ever been driving along a country road at night, and all of a sudden a car comes around the bend and shines their high beams right into your eyes? Ugh, they’re so bright! You also notice that their lights look a bit bluer than you’re used to. That’s because they might be. Regular headlights are made up of white light, which is a combination of all colors of the rainbow. But these blue lights, while still containing a mixture of all colors, contain more blue wavelengths¹, making them appear more blue to our eyes. Many luxury cars have these types of lights, called High Intensity² Discharge lamps, because the headlights seem brighter under most conditions. But on a foggy night?They actually make visibility worse. Fog is made up of suspended water particles in the air, like a cloud settled down on the earth. But blue light scatters³ more effectively off these water particles than regular headlights do.