What natural phenomena will appear in sunny weather after rain?

1. Rainbow, also known as the rainbow, is called rainbow for short, and "color", as the name implies, means "colorful" and "colorful". "Rainbow" and "Gong" represent the sound side, while "Bug" represents the shape side. Why is it next to the word "worm"? Because in ancient times, people didn't know that raindrops were related to raindrops and thought raindrops were insects, so the word insect was used.

Rainbow is an optical phenomenon in meteorology. When sunlight hits the raindrops in mid-air, the light is refracted and reflected, forming an arched color spectrum in the sky. The colorful colors of the rainbow are red, orange, yellow, green, blue, indigo and purple from outside to inside.

Rainbow is a natural phenomenon, which is produced by the reflection and refraction of sunlight into water droplets in the air.

Rainbow [natural phenomenon]

cause

Optical principle chart of rainbow formation

Rainbow is formed by the scattering and reflection of sunlight on small round water droplets in the air. When sunlight hits water droplets, it will be incident at different angles at the same time and reflected at different angles in the water droplets. The reflection of 40 to 42 degrees is the strongest, which produces the rainbow we see. When this reflection occurs, sunlight enters the water drop, refracts once, then reflects on the back of the water drop, and finally refracts again when it leaves the water drop. Because water has a dispersive effect on light, the refractive index of light with different wavelengths is different, and the refractive angle of blue light is greater 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.

In fact, as long as there are water droplets in the air and the sun shines behind the observer at a low angle, an observable rainbow phenomenon may occur. Rainbow usually appears in the afternoon, when the rain clears. At this time, the air is less dusty and full of small water droplets, and one side of the sky is dark because of rain clouds. However, the observer can see the sun without a cloud covering his head or back, so that the rainbow will be easier to see. Another place where rainbows are often seen is near waterfalls. In sunny weather.