Features of a wave

A wave is a movement or oscillation that spreads from a defined point, moving energy as it progresses.

Scientist use a standard set of terminology to describe the feature of waves. The following illustration shows a cross-section through a transverse wave^*. Use the switches below the main window to label the features:

• Crest - the highest point in the wave.
• Trough - the lowest point in the wave.
• Wavelength - the horizontal distance between successive crests, troughs or other parts of a wave.
• Wave height - the vertical distance between the crest of a wave and its neighboring trough. This term is commonly used when describing water waves where the undisturbed surface is not easily determined.
• Amplitude - the amount of displacement from the equilibrium or rest position. Equal to one half the wave height.
• Undisturbed surface - resting state or equilibrium position of medium in the absence of a wave.
• Period - the time it takes for successive crests or troughs to pass a specific point.
• Frequency - the inverse of period.The number of crests or troughs that pass a point during a set time interval.

Test your understanding with Features of a wave concept questions.

• Illustrations
  • Types of Waves
  • Wave Interference
• Problem Sets
  • Types of waves problem set
  • Features of a wave problem set
  • Wave Interference Concept Questions