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What is the speed of light

What is the speed of light
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What is the speed of light

User Mike Metzger
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8.5k points

1 Answer

7 votes

In vacuum and empty space, it's 299,792,458 meters per second
(186,282.4 miles per second).

In any material stuff, it's somewhat less. How much less depends on
what stuff it is ... it's different in each material "medium".

User Ddegasperi
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