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6 June, 07:18

How fast does light travel per sec

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  1. 6 June, 07:41
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    The speed of light ..., and all other electromagnetic waves ... is

    299,792,458 meters per second

    when they're traveling through vacuum.

    It's somewhat less when they're traveling through any kind of material stuff.

    The exact speed is different for every material ... air, water, glass, diamond,

    jello, etc.
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