What is thunder?

1, thunder is discharge.

For example, when the weather changes greatly, the air will become unstable and prone to strong upward convection, thus forming cumulonimbus clouds. There are a lot of active water vapor in cumulonimbus clouds, which will generate static electricity if it moves up and down continuously.

2. After static electricity is formed, positive charges will gather at the top of the cloud and negative charges will gather at the bottom, but the ground is also negative. When the voltage difference between the negative charge at the lower end of the cloud and the ground is large, it will break through the air, making the air instantly expand and explode, releasing heat and light. The light emitted is lightning, and the loud noise emitted by the expansion explosion is thunder.

When it thunders, you must pay attention to safety. It is forbidden to stay at the top of the mountain or on the mountain. You can't hide under a big tree or near a telephone pole. You should also pay attention to the use of home appliances. It is best to turn off the TV, tape recorder, stereo, air conditioner and other electrical appliances indoors.