Cause the voice comes 10 times faster than the flash so it is not dangerous but in that case it means that probably another flash of lighting is about to strike.
The farther in between the two, the farther away the danger.
A lightning flash travels at the speed of light. The sound of thunder travels much slower. Therefore, we see the flash before we hear the thunder.
The thunder is the sound of lightning but you only hear the thunder after the flash because lightning is faster than the speed of sound.
It's neither because it's an erroneous statement. Thunder is the sound made by lightning; it therefore cannot precede the lightning flash because the lightning flash travels at the speed of light and the thunder travels much more slowly at the speed of sound.
In simple terms... light travels much faster than sound. The sound of the thunder takes much more time to reach you - than the flash of the lightning.
The farther in between the two, the farther away the danger.
If you hear the thunder almost at the same time as the lightning flash - the storm is directly overhead. Usually - the sound of thunder arrives a few seconds after the lightning, because light travels much faster than sound.
You don't see thunder. You hear thunder. You hear thunder after seeing the lightning because light travels faster than sound. The further the storm away is, the bigger the time between when you see the lightning and hear the thunder.
then the lightning is 2.78 miles away from you.
A lightning flash travels at the speed of light. The sound of thunder travels much slower. Therefore, we see the flash before we hear the thunder.
The thunder is the sound of lightning but you only hear the thunder after the flash because lightning is faster than the speed of sound.
It could be. The light from the flash travels much more quickly than the sound waves that make up the thunder. So a longer time between them indicates that the lightning is farther away. If the thunder is immediate, you are very close to the lightning!
5 miles away
the lightning is roughly a mile away
lightning heats the air which we hear as thunder
It's neither because it's an erroneous statement. Thunder is the sound made by lightning; it therefore cannot precede the lightning flash because the lightning flash travels at the speed of light and the thunder travels much more slowly at the speed of sound.
If you hear the thunder almost at the same time as the lightning flash - the storm is directly overhead. Usually - the sound of thunder arrives a few seconds after the lightning, because light travels much faster than sound.