- Ray Tuck
- The simulation represents a longitudinal wave traveling along a spring. The grey bands represent the coils of the spring.
- As the piston moves to the right it compresses the coils in front of it. As it moves to the left it stretches the coils.
- The compressions and rarefactions move along the spring as a wave.
- The blue dots show the position of the greatest compression as the wave moves along the spring.