How fast is the speed of light?

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asked Apr 13, 2016 138k views

1 Answer

ScottJ · Answer 1 · 2016-04-19T19:36:12+0000

The speed of light is 299,792,458 meters per second in vacuum.
It's somewhat slower in any material substance, and different in
each substance.

(That's 186,282.4 miles per second.)

How fast is the speed of light?

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