Because light travels faster than sound.
The closer together the flash and thunder occur, the nearer the storm is to you.
Thunder is the sound produced by lightning as it rapidly heats and expands the air. It is not a flash like lightning, but rather the result of the shock wave created by the sudden expansion of the air.
The sound following the flash of lightning is thunder. Thunder is caused by the rapid expansion and contraction of air surrounding the lightning bolt, creating a sonic shockwave that we hear as a loud rumbling noise.
The thunder always comes after the flash. Depending on how far away the lightning hit, the thunder will reach you after different times. The sound travels at roughly 340,20 m/s, so an easy-to-remember rule is that if there's a flash and you count to three seconds, it is roughly 1 km away.
The loud rumbling noise after a lightning flash is called thunder.
You hear the sound, called thunder, after the flash because light travels many times faster than sound and therefore reaches you first.
Thunder itself is not visible. Thunder is the sound produced by the rapid expansion of heated air surrounding a lightning bolt. Lightning, on the other hand, is visible and is the actual electrical discharge that produces the light we see during a storm.
flash is used on a camera in case it is too dark or just plain terrible lighting. bad lighting always makes a horrible picture.
He was hit by lighting from the particle accelerator .
thunder
It is not dangerous because sound travels at a slower speed than light. When you see the flash of lightning, the storm is typically far enough away that the lightning poses no immediate threat. If thunder is heard long after the flash, it indicates that the storm is moving away from your location.
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