Question

speed of light in air km per second is _________.
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Answer 1

speed of light in air km per second is 299,792 kilometers per second .

Answer 2

Answer:

light travels in approximately 300,000 kilometers per second in a vaccum which have a refractive index of 1.0, but it slow down to 225,000 kiloneters per second in water( refractive index of 1.3 ) and 200,000 kilometers per second in glass ( refractive index of 1.5 )

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