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how to calculate the speed of light in the optical fibre. Since light travels down light in approximately a straight line we can use the formula D T V where D is the distance the fiber travels T is the time it takes to travel and V is the velocity of light. It is calculated by dividing speed of light in vacuum to the speed of light in material.
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The index of refraction for glass is roughly 15. It is calculated by dividing speed of light in vacuum to the speed of light in material. Where a is called as profile of the fibre.
Multiple light paths in a graded index core are controlled so that they converge at multiple points along the cable.
The light travels along the optical fiber reflecting off the walls of the fiber. The speed of light inside fiber is close to 2108 ms. In comparison the solid silica glass fibre optic cables in use today propagate light at some 69. Distance Speed of Light 299792mµs Refractive Index.
