A Complete Collection of 100000 Whys
Fav十万个为什么
为什么闪电是闪光的？
1、闪电是云层中电荷分离和积累的结果，当正负电荷积累到一定程度时，会形成强大的电场。
2、当电场强度超过空气的绝缘能力时，空气会被击穿，形成导电通道，电流迅速通过。
3、电流通过空气时，会使空气中的分子和原子激发，这些激发的粒子在回到基态时会释放光子。
4、释放的光子形成了我们看到的闪电，其颜色和亮度取决于电流强度和空气的成分。
5、闪电的温度极高，可达数万摄氏度，因此闪电发出的光非常明亮，甚至比太阳还要亮。
总之，闪电是电荷分离和电流通过空气时激发空气分子释放光子形成的，其亮度和温度使其显得非常耀眼。
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