Now we will talk about what is the thunder.This natural phenomenon is usually observed after lightning.Similar phenomena caused terrible fear among our ancestors, they considered them a manifestation of the wrath of the gods.In the days of ancient Slavic paganism was spread.They worshiped different gods, including Perun - the god of thunder, lightning and thunder.He was central to the Old Slavonic pantheon.And, like any great god, Perun was devoted to personal holiday.Perun's Day was celebrated on July 21.God is worshiped as giving life-giving rain to the environment.On this day, the ancestors of his glory, after the consecrated their weapons, made a sacrifice, performed the rite of remembrance of the fallen soldiers in the fighting.The culmination of the day was a hearty meal and merrymaking.
These times have sunk into oblivion, and thunder and lightning were.Look into specialized guides or books of natural history.There we can read what the thunder - the sound vibrating the air around the lightning, which quickly heats up and expands.Probably, you do not just pay attention to the fact that sometimes we first see an electric discharge, and only then hear the roar.What happens is because the light waves travel at the speed of about 300,000 km / s, and the sound - much slower, about 335 m / s.But not always thunder and lightning during a thunderstorm united.It so happens that there was a flash of lightning and the sound is not audible.This can be done if a thunderstorm too far.It happens that the thunder, but lightning is not visible - it is difficult to see on a clear day, and when it is formed in the clouds.
If you want to know how far away the storm to do so there is no trouble.You just need to count how many seconds pass between the flash of electric discharge and the sound of thunder, split into three, and you'll know how many kilometers in the distance from you is a thunderstorm.If you make a few such calculations, you can see approaching or moving away from you a cloud.In the case where the thunder is heard, it can be argued that the storm front of you is more than twenty kilometers.
To understand how lightning is formed, we should remember the school curriculum - the section of electricity.We know that all things are charged either positively or negatively.During a thunderstorm, cloud droplets, condensing, taken positively charged particles.The cloud becomes negatively charged relative to the Earth.In the case where the charge in a cloud of rain is too large, there is lightning.The same phenomenon you can observe when this occurs between the clouds.
Now let's see what is thunder?During electrical discharge air rapidly expands, then contracts, with a rapid movement of air currents.When there is contact between them, hear the sound of thunder.The volume of these rolls can reach 120 decibels.
reading this article, you have learned and can do little to explain howcast what thunder, lightning, how they are formed and why there was a roar.
