Rare! There are red rainbows everywhere in Finland now. What is the potential meaning of rainbow?

In some special weather, there will be some special weather conditions and many scenery will be formed. Recently, a full red rainbow appeared in Finland. What is the all-red rainbow in Finland? What is the meaning of the rainbow?

A rare all-red rainbow appeared over Finland. A fisherman photographed a red rainbow on the lake in the north of the capital Helsinki. The picture is a little cold, and with the light red rainbow, it looks a bit strange. The man said it was formed after rain, but I didn't expect it to be so rare. It is said that this phenomenon is very similar to a normal rainbow, but it looks red in the end, because shorter wavelengths such as blue and green will scatter at sunrise or sunset. The scattered colors cause only red to be seen.

What is the deep meaning of rainbow? Rainbow represents beauty, fairy tales, nature and fantasy. The rainbow will only appear after the rain, which shows that the beauty to be pursued can only be achieved through some setbacks. Besides, different civilizations have different beliefs about rainbows. According to Greek mythology, the rainbow is a bridge between heaven and earth.

The principle of rainbow: rainbow is the dispersion and reflection caused by sunlight shining on spherical water droplets in the air. When sunlight enters the water drop, it will be incident at different angles at the same time and reflected at different angles in the water drop. The reflection of 40 to 42 degrees is the strongest, which produces the rainbow we see. When this kind of reflection is caused, the sunlight enters the water drop, refracts once, then reflects on the back of the water drop, refracts again when leaving the water drop, and always refracts twice after one reflection. Because water has a dispersive effect on light, the refractive index of light with different frequencies is different. The refractive index of red light is smaller than that of blue light, and the deflection angle of blue light is larger than that of red light. Because light is reflected in water droplets, the spectrum seen by the observer is reversed, with red light at the top and other colors at the bottom. So the heights of rainbows and neon lights are different, and the hierarchical order of colors is just the opposite. Rainbow means that light is refracted twice and reflected once, while neon means that light is refracted twice and reflected twice.