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Thread: Optic Fibre Cables

  1. #1 Optic Fibre Cables 
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    I've been studying optic fibre (Yes, I'm Australian ) cables and I have a few questions about it.

    When we use optic fibre cables, the light has to travel through glass, doesn't this mean there is a decrease in speed? Or is the earth small enough that this difference is not significant?

    Is visible light energy used because it has a higher frequency, thus allowing more wavelengths to be sent and received in a unit of time?

    Would the light inside the fibre optic cable still be subjected to the inverse square law? Through research i found that it is caused by the same amount of energy becoming spread over a larger area increasingly. However since the energy in fibre optic cables is confined, does this mean it does not experience the effects of the inverse square law?

    Thanks, much appreciated


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