Wave motion can be seen in action by throwing a pebble into a pool of still
water. The ripples that move toward the edge of the pool demonstrate the
Figure 1-Sum 1. Formation of Waves in Water
The transverse wave is a type of wave motion. Radio, light, and heat waves
are examples of transverse waves.
Figure 1-Sum 2. Elements of a Wave
The longitudinal wave is another type of wave motion. The sound wave is the
only example of a longitudinal wave given in this text.
Source, medium, and detector (receiver) are the three requirements for all
Figure 1-Sum 3. The Three Elements of Sound