LONGITUDINAL WAVES
The different kinds of waves have many features in common. Having considered one type of wave, we can apply the same methods to describe the behaviour of other waves, such as sound waves, light waves.
Waves in which the vibration of particles is in the same direction in which the wave travels are called longitudinal waves. Waves in which the movement of particles is at right angles to the direction in which the wave travels are called transverse waves.
Each particle on the path of a longitudinal wave, Fig. 1.3, performs simple harmonic motion about its average position as the wave moves through it. Although both types of wave may pass through the same material, their velocities are generally different because of the different ...
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