http://www.ck12.orgCHAPTER
12 Waves and Energy Transfer
Chapter Outline
12.1 Transverse Waves
12.2 LONGITUDINALWAVES
12.3 DOPPLERSHIFT
12.4 REFLECTION OFMECHANICALWAVES
12.5 REFRACTION OFMECHANICALWAVES
12.6 REFERENCES
A surfer’s kinetic energy comes directly from the waves themselves. Of all the wave forms we will study, it is
with water waves that we have the most personal experience. Water waves in large bodies of water, however, have
movement that isnotdue to the natural characteristics of waves. In pure transverse waves—like water waves—the
particles of media move perpendicularly to the direction of the energy movement. If we were to create a perfect
water wave in a lab, the water molecules themselves would only move up and down, while the energy of the wave
would move horizontally toward the sides of the pan. In such a perfect wave, the apparent movement of water toward
the side of the pan is an illusion. After completing this chapter, you will understand different types of waves, as well
as their properties.