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Similarly, wave processes revealed from the study of waves different from that of sound waves can be significant to the understanding of [[sound]] [[phenomena]]. A relevant example is Thomas Young's principle of interference (Young, 1802, in Hunt 1992, p. 132). This principle was first introduced in Young's study of light and, within some specific [[contexts]] (for example, scattering of sound by sound), is still a researched area in the study of sound.
Similarly, wave processes revealed from the study of waves different from that of sound waves can be significant to the understanding of [[sound]] [[phenomena]]. A relevant example is Thomas Young's principle of interference (Young, 1802, in Hunt 1992, p. 132). This principle was first introduced in Young's study of light and, within some specific [[contexts]] (for example, scattering of sound by sound), is still a researched area in the study of sound.
==Characteristics==
==Characteristics==
[[File:Wave_motion-i18n-mod.jpg|right|frame| '''A''' = In deep water.<br /> '''B''' = In shallow water. The elliptical movement of a surface particle becomes flatter with decreasing depth.<br />
[[File:Wave_motion-i18n-mod.jpg|right|frame| '''A''' = In deep water.<br /> '''B''' = In shallow water. The elliptical movement of a surface particle becomes flatter with decreasing depth.<br />
'''1''' = Progression of wave <br />
'''1''' = Progression of wave <br />
'''2''' = Crest<br />
'''2''' = Crest<br />
'''3''' = Trough]]
'''3''' = Trough]]
Periodic waves are characterized by crests (highs) and troughs (lows), and may usually be categorized as either longitudinal or transverse. [http://en.wikipedia.org/wiki/Transverse_wave Transverse waves] are those with vibrations perpendicular to the direction of the propagation of the wave; examples include waves on a string, and electromagnetic waves. [http://en.wikipedia.org/wiki/Longitudinal_wave Longitudinal waves] are those with vibrations parallel to the direction of the propagation of the wave; examples include most sound waves.
When an object bobs up and down on a ripple in a pond, it experiences an orbital trajectory because ripples are not simple transverse sinusoidal waves.
Ripples on the surface of a pond are actually a combination of transverse and longitudinal waves; therefore, the points on the surface follow orbital paths.
Ripples on the surface of a pond are actually a combination of transverse and longitudinal waves; therefore, the points on the surface follow orbital paths.
