Waves Inv. 4 - Communication Waves. _ means it has to do with _ waves.

Optical fibers _ ___ for very ___ distances by using total internal reflection. The information is encoded as _. Light waves travel _ ___. Information sent from New York by fiber optics could reach Australia in less than ___ _.

The information must be encoded to be sent as patterns of _.

But Morse code serves as a _ that we can use to understand ___ ___ is __ and ___ through optical fibers as light waves.