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31 August, 11:30

What is the speed of light in a vacuume?

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  1. 31 August, 11:57
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    The speed of light in vacuum is exactly

    299,792,458 meters per second.

    That's so exact that it's the official scientific definition of a "meter".

    The number doesn't t change even if the flashlight or other light source is moving.
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