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Science

How far away is lightning?

2

If you count the number of seconds between the flash of lightning and the sound of thunder, and then divide by 5, you'll get the distance in miles to the lightning: 5 seconds = 1 mile, 15 seconds = 3 miles, 0 seconds = very close. Keep in mind that you should be in a safe place while counting.

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You can tell how far away lighting is by counting the seconds between seeing the flash and hearing the sound. Sound travels about 1 mile in 5 seconds, so if you see a flash of light and begin counting seconds before the sound reaches you, every 5 seconds is equal to a mile away.

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