> terrestrial internet goes through optic fiber in which the speed of light is maybe half the speed of light in a vacuum. What's your source for this? Accordin

> terrestrial internet goes through optic fiber in which the speed of light is maybe half the speed of light in a vacuum. What's your source for this? According to my quick search, it's typically 0.66c - 0.76c while researches have reached 0.99c.