【英语时差8,16】为什么有的车头灯是蓝色的？（上）

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.

1 wavelengths   

n.波长( wavelength的名词复数 )；具有相同的/不同的思路；合拍；不合拍

参考例句：

• I find him difficult to talk to—we're on completely different wavelengths. 我没法和他谈话，因为我们俩完全不对路。 来自《简明英汉词典》
• Sunlight consists of different wavelengths of radiation. 阳光由几种不同波长的射线组成。 来自辞典例句

2 intensity   

n.强烈，剧烈；强度；烈度

参考例句：

• I didn't realize the intensity of people's feelings on this issue.我没有意识到这一问题能引起群情激奋。
• The strike is growing in intensity.罢工日益加剧。

3 scatters   

v.（使）散开， （使）分散，驱散( scatter的第三人称单数 )；撒

参考例句：

• He scatters money about as if he were rich. 他四处挥霍，好像很有钱。 来自《简明英汉词典》
• Truth raises against itself the storm that scatters its seeds broadcast. 真理引起了反对它自己的狂风骤雨，那场风雨吹散了真理的广播的种子。 来自辞典例句