这是第二大误区,但其实雪不是白色的,而是无色的。雪是由冰晶分子组成的,而冰是半透明的,也就是说光线不能很轻易地穿透它,而会被其反射。
When light hits a snowflake, it gets reflected back from the snowflake’s many surfaces, often bouncing between these surfaces, and because of this that light is reflected back to our eyes as the color white. This is why, up close or magnified, a snowflake always looks clear, yet in reality appears as white.
当光线照射在雪上,雪花的众多冰晶表面会将其反射回去,通常是在各表面间来回反射,也正因为如此,反射进我们眼睛中的光线就呈现出了白色。这就是为什么近看或放大看雪花,颜色是透明的,但是在实际生活中肉眼看上去却是白色的。
translucent[træns'lusnt]: adj. 半透明的
3. Snow always looks white
雪看起来总是白色的
Lastly, snow doesn’t always appear to us as the color white. Not counting the infamous yellow snow that everyone knows never to eat, you can also get naturally blue snow or even pink snow.
最后,雪所呈现的颜色也不是只有白色。不算上臭名昭著的黄雪(每个人都知道不要吃这种雪),还有天然的蓝色雪甚至是粉色雪。
Deep snow can sometimes appear blue in color because the extra layers of snow create a filter for light, which causes more red light to be absorbed by the snow than blue light, meaning that it looks blue.
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