How fast does light travel in a fiber-optic cable?

124,188 miles per second
The refractive index of light in a vacuum is one. The refractive index for single-mode fiber can vary slightly based on a number of factors. However, a good estimate is around 1.467, meaning that light travels through fiber at 186,282/1.467 = 124,188 miles per second.

How far can light travel in a fiber-optic cable?

Modern fiber optic cables can carry a signal quite a distance — perhaps 60 miles (100 km). On a long distance line, there is an equipment hut every 40 to 60 miles.

How fast does light travel in a cable?

In the case of an electrical cord connecting a table lamp or some other household item to a power source, the copper wire inside the cord acts as the conductor. This energy travels as electromagnetic waves at about the speed of light, which is 670,616,629 miles per hour,1 or 300 million meters per second.

How does light travel in a fiber optic cable?

Light travels down a fiber optic cable by bouncing off the walls of the cable repeatedly. Each light particle (photon) bounces down the pipe with continued internal mirror-like reflection. The light beam travels down the core of the cable.

What is the speed of light if light travels 31\% slower in fiber optic line how fast does light travel through the line?

206,856,796 m/s.
Light travels about 31\% slower in a fiber-optic cable, which means your data travels at 206,856,796 m/s. In other words, it takes a millisecond for every 206.9 kilometers of fiber your internet signal has to travel.

Why is fiber optic so fast?

The throughput of the data is determined by the frequency range that a cable will carry — the higher the frequency range, the greater the bandwidth and the more data that can be put through per unit time. And this is the key difference — fibre optic cables have much higher bandwidths than copper cables.