The line of sight leaves the mirror at the same angle it meets it and is reflected back many times. Lightening balls begin to show their stuff as you near their force. There are loose electrons in the ball. When you go near the ball, the positive protons in your body attract the electrons in the ball. Place your finger or your whole hand on the lightening balls to see the electrifying results.
Electrons are negative particles that are attracted to positively charged particles called protons.
The Whisper Tube is used in communicating with students in another part of the IDEA Place by whispering. This is the same method in which Alcatraz prisoners communicated with each other by use of water pipes. Instead of spreading out in all directions, the sound wave inside the tubes are trapped. The vibrations are continually reflected and channeled down the tubes into the surrounding air. A doctor's stethoscope works the same way.