What are the wonderful natural sights and phenomena in nature?

2. The rainbow is formed by small water droplets in the sky. The role of small water droplets is similar to that of a prism to refract natural light and form various monochromatic lights in the sky. It is really amazing! However, due to the deterioration of environment and weather, rainbows become less and less common after rain.

2. Meteor shower

Whenever some well-known comets run near the earth, there will be meteor shower wonders on the earth, such as the Leonid meteor shower. First, the comet approaches the sun and is irradiated by high energy, evaporated, vaporized and shattered when it approaches the earth. Influenced by the gravity of the earth, comet fragments fell to the earth. When passing through the atmosphere, they glow and heat due to high-speed friction with the air, and countless comet fragments "meteor showers" fall from the ground. But most meteor showers burn in the atmosphere.

3. Lightning

Storm clouds usually produce charges, with negative charges at the bottom and positive charges at the top. They also produce positive charges on the ground, which move around with the clouds. Positive and negative charges attract each other, but air is not a good conductor. Positive charges rush to treetops, hilltops, tall buildings and even human bodies in an attempt to meet negatively charged clouds.

Dendritic tentacles with negative charges extend downward and get closer to the ground. Finally, the positive and negative charges finally overcome the air barrier and connect. A huge current rushed from the ground to the clouds along the conductive path, producing a bright flash. The length of lightning may be only a few kilometers, but the longest can reach hundreds of kilometers.