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Why do we hear thunder some seconds after seeing lightning?

Lightning is a gigantic spark of electricity that connects the thundercloud to the ground. It’s so hot that it causes the air to “explode” — that’s the sound we hear as thunder. However, thunder travels much slower than the light from a lightning bolt, so we usually hear thunder a few seconds after we see lightning.

What do we hear after a flash of lightning?

Immediately after the flash, the air cools and contracts quickly. This rapid expansion and contraction creates the sound wave that we hear as thunder. Although a lightning discharge usually strikes just one spot on the ground, it travels many miles through the air.

Why do we see the flash of lightning first and hear the thunder later?

If we are watching the sky, we see the lightning before we hear the thunder. That is because light travels much faster than sound waves. We can estimate the distance of the lightning by counting how many seconds it takes until we hear the thunder.

Is it safe to shower during a thunderstorm MythBusters?

Since the MythBusters were shy about showering on camera, they hired a stand-in: a ballistics gel dummy that had roughly the same electrical conductivity as the human body. Just as the National Weather Service warns, it’s safe to shower only once thunderstorms have passed you by.

What is the OSHA rule for lightning?

Lightning is likely to strike the tallest objects in a given area—you should not be the tallest object. Avoid isolated tall trees, hilltops, utility poles, cell phone towers, cranes, large equipment, ladders, scaffolding, or rooftops. Avoid open areas, such as fields. Never lie flat on the ground.

Does mobile attract lightning?

“Cell phones, small metal items, jewelry, etc., do not attract lightning. Nothing attracts lightning. Lightning tends to strike taller objects,” said John Jensenius, a NOAA National Weather Service lightning expert. “People are struck because they are in the wrong place at the wrong time.