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Q:
Why do you see the lightning before you hear the thunder?
A:

The reason we almost always see the lightning before hearing the thunder is because light travels much faster than sound. Thunder and lightning happen in the same place at about the same time. In fact, the lightning produces the thunder. When lightning occurs, the nearby air becomes very hot and expands quickly, causing an explosion. The sound of thunder is really the sound of this explosion.

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February 20, 2018

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