Light isn't that fast. It only goes about a foot per nanosecond. It can be fun to work out for people how many bits are in a piece of cable at any moment, and

Light isn't that fast. It only goes about a foot per nanosecond. It can be fun to work out for people how many bits are in a piece of cable at any moment, and that's assuming electrical information in a cable travels as fast, which it doesn't. A real demo is to talk via VOIP with someone on a satellite internet connection. The old, geostationary satellite kind. It takes so long for the audio to get there and back that you have to practically say "over" when you're done talking.