为什么衣服湿了颜色会变深

为什么衣服湿了颜色会变深 为什么衣服湿了颜色会变深 湿衣服的颜色看起来要比干衣服深一 些,不知道大家在洗衣服的时候有没有注意过这个。这是什么原因呢? 难道真是传说中的水给衣服染了色?当然不是。其实,这是光的恶作 剧。 When light illuminates dry cloth, a typical light beam will hit a fiber,refract(折射)into it, and then refract back out of it. Because cloth has a high index(指数)of refraction, the light usually gets bent a lot at both refractions, so it comes out in a different direction than it went in. Also, because cloth is not perfectly transparent, the light comes out a little dimmer than it went in. A light beam will undergo this process many times, passing through many fibers in succession, and so effectively, a lot of the light is scattered off the cloth in a random direction. Some of this light hits your eye, and then you can see the cloth. When you get the cloth wet, the air between the fibers is replaced by water. Water has a much higher index of refraction than air, and so the relative index of refraction between water and the fiber is much lower than between air and the fiber. Thus, each time when a light beam enters a fiber, it is bent much less than it otherwise would be. Therefore, the light beam has to pass through many more fibers before it is turned all the way around, and can come back out of the cloth to hit our eyes. Remember that each time the light beam passes through a fiber, it gets dimmer. Since the light is now passing through a lot more fibers, it gets a lot dimmer before it leaves the cloth, so a lot less light is coming back to our eyes. Hence, the cloth appears darker.上一篇英语: 肚子饿了为什么会咕咕 叫下一篇英语: 看植物之间怎么交流感情查看更多关于翻译点滴的 文章网友同时还浏览了: 常用的翻译4 常用的翻译词汇3 常用的翻译词汇2 常用的翻译词汇1 常用成语翻译 (2) 常用成语翻译 (1)