How come the lightning you usually see in lightning weather is curved?
As we all know, there are many colloidal substances and other particles in the air we live in every day. Sunlight originally shines vertically on the earth's surface, but because these colloidal substances and other particles in the atmosphere will have some refraction, reflection and even absorption effects on the sunlight, the sunlight cannot reach the earth's surface completely smoothly. Lightning is a kind of charged light, so when it propagates in the atmosphere, it will be reflected, refracted or even absorbed like sunlight, so all the lightning we see will be curved.
The formation of lightning has a great relationship with charge. It is formed by the collision of two charged clouds. Actually, these two charged clouds can be said to be two electrodes. When these two electrodes collide with each other like a huge crustal plate on the earth, sparks will be generated due to the action of force. Together, these sparks are continuous arc lightning in our field of vision.
Generally, lightning is accompanied by huge thunder, because the speed of sound propagation in the air is not as fast as the speed of light, so we will see lightning first and then hear thunder on a rainstorm day. Because lightning is produced by the collision of charged clouds, lightning itself is electricity. If lightning strikes the ground or buildings in rainy days, it is very dangerous, because the power of lightning is beyond our imagination.