4 ms·

Light in fiber travels about 30% slower than in a vacuum. http://physics.stackexchange.com/questions/80043/how-fast-does-light-travel-through-a-fibre-optic-cabl

by pwarner 11y ago

Light in fiber travels about 30% slower than in a vacuum. http://physics.stackexchange.com/questions/80043/how-fast-does-light-travel-through-a-fibre-optic-cable http://physics.stackexchange.com/questions/80043/how-fast-do...