1) I begin the demonstration by playing music through a speaker, the sound energy is picked up and transformed into electrical signals by the transmitter and carried through the fiber optic cable to the receiver where it is played through a speaker.
2) I then cut through the cable to show how the sound disappears. When the ends of the cut cable are brought together again, the sound returns.
3) Next, I turn the music off and place a mirror over the speaker. I shine a laser onto the mirror so that the reflection of the laser appears on the ceiling. I then pluck the strings of a guitar near the transmitter. The laser vibrates rapidly as it does in a laser light show. This is a visualization of the sound waves.
List of Materials:
Kit purchased at Quasar Electronics