Approximately what is propagation delay in a 4km optical fibre

[From: ] [author: ] [Date: 11-05-16] [Hit: ]

Thanks.-Depends on the refractive index of the fibre.Say it is 1.5.Speed of light in fibre = 3x10^8 / 1.Time = distance /speed = 4000 / (2x10^8) = 2x10^-5s(= 20x10^-6 = 20microseconds)-Try this http://seekitnow.......

Is it 3*10^8/4000?

If not what?

Thanks.

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Depends on the refractive index of the fibre. Say it is 1.5.

Speed of light in fibre = 3x10^8 / 1.5 = 2x10^8 m/s

Time = distance /speed = 4000 / (2x10^8) = 2x10^-5s (= 20x10^-6 = 20microseconds)

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Try this http://seekitnow.info/429404/fibre

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