Where is Xuehuang? Why?

This is caused by the reflection of countless ice crystals that make up snowflakes. Because the reflection coefficient of ice to various colors of light is almost the same, and the reflected light and incident light are completely homogeneous, snowflakes are white during the day. However, it seems a bit strange that a single ice crystal is almost transparent ... In order to explain why snow is opaque, we should talk about the formation process of snowflakes. When the air is cold, the water in the cloud will condense into various tiny suspended particles. However, this agglutination process is very slow, so water molecules will not gather together quickly, but form some very beautiful crystals with extremely smooth surfaces. Then, under the action of the wind, these crystals collide with each other in the air and finally form flocculent snowflakes. Although the surface of a crystal is transparent because of weak reflection, the reflection of multiple crystals will make snowflakes almost become "mirrors". This metaphor is no exaggeration, you know, the newly fallen snow can reflect 95% of the light! Because of this, the new snow will look so white. When people take part in winter sports outdoors, they'd better wear sunglasses. As time goes on, the ice crystals will gradually become round and the reflective ability will be weakened. Snow after winter can only reflect 50% of the light, and snow in spring is not as shiny as snow a few months ago.

Red snow fell in Chayu, Tibet, Heidelberg, Germany and Antarctica. It has snowed yellow in Inner Mongolia and other areas. There is a green snow on Spitsbergen Island in the Arctic Ocean. Even more amazing, it snowed in Italy, Romania and southern Sweden.

Why does snow have different colors? That's because the snow is mixed with colored substances. In cold areas, algae are widely distributed and varied. The algae containing chlorophyll is green, the algae containing red pigment is red, and the yellow algae containing a lot of fat. These algae are light. When encountering strong winds, they will fly to the sky and attach themselves to snowflakes, and multiply rapidly, thus playing a "stain" role on the snow. It can be seen that snow has various colors, but its essence is white.

Why does snow have different colors? That's because the snow is mixed with colored substances. In cold areas, algae are widely distributed and varied. The algae containing chlorophyll is green, the algae containing red pigment is red, and the yellow algae containing a lot of fat. These algae are light. When encountering strong winds, they will fly to the sky and attach themselves to snowflakes, and multiply rapidly, thus playing a "stain" role on the snow. It can be seen that snow has various colors, but its essence is white.