Sihai network

Why do you see lightning first and then hear thunder

Four seas network synthesis; why to see lightning first and then hear thunder life ten small knowledge ~! In summer, we often encounter thunderstorms. If you pay attention to seeing lightning first and then hearing thunder, you may think that lightning first and then thunder; or you may think that the place where lightning strikes is far away from us, and the place where lightning strikes is close to us.

In fact, this is not the case. Let's first look at how lightning is generated. Lightning is a phenomenon in nature. Clouds in the air are electrified due to sunlight, friction and induction. When clouds with two different charges approach, there will be discharge, flash and explosion. This is lightning in the air.

It can be seen that lightning flash and thunder occur at the same place at the same time. The speed of lightning flash in the air is 300 million meters / second. The speed of lightning explosion is only 340 meters / second in the air. The speed of light in the air is about 882353 times of the speed of sound. The speed of light is much faster than that of sound. According to S / V, although lightning and thunder happen at the same time, we always see lightning first and then hear thunder.