The light in fiber optic cables travel at the speed of light, don't they?
Only, not the characteristic speed of light in vacuum, c≈300 000 km/s. You have to take the refractive index into account. But it's still the speed of light, through that specific medium (fiber optic cable in this case).
OpenGiraffe t1_iu00sq9 wrote
Reply to comment by Muroid in Every language travels at the speed of sound, except sign language that travels at the speed of light by _somename_
The light in fiber optic cables travel at the speed of light, don't they?
Only, not the characteristic speed of light in vacuum, c≈300 000 km/s. You have to take the refractive index into account. But it's still the speed of light, through that specific medium (fiber optic cable in this case).