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Yesterday, 23:29

How fast do differnt parts of the em spectrum travel in a vaccuum

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  1. Yesterday, 23:54
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    All electromagnetic radiation ... all wavelengths, all frequencies ... has the

    same speed, as long as you're measuring all through the same medium.

    The speed is fastest in vacuum ... 299,792,458 meters per second. It's

    slower than that in any material, and different in every material.
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