GCSE Combined Science (AQA)

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Wave Speed

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Waves Waves in air, fluids and solids

Wave Speed

7:12 Wave Speed
Spec 4.6.1.2
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  • Wave speed is the speed at which energy is transferred by the wave.
  • Matter vibrates to transport energy without moving overall.
  • Wave speed differs from frequency; frequency indicates how quickly waves are produced, not how they carry energy.
  • Wave speed can be visualized as the speed at which a point on the wave travels.
  • Wave speed can be calculated from the time it takes a point on the wave to travel one wavelength.
  • Wavelength is the distance after which the wave pattern repeats.
  • The period of a wave is the time it takes for the wave to repeat its cycle of motion.
  • Speed equation: speed = distance/time (V = S/T).
  • For waves, speed = wavelength/period (V = ��/T).
  • Frequency and period relation: F = 1/T.
  • Wave speed equation: V = ��F (speed = wavelength x frequency).
  • Units: wavelength in meters, frequency in hertz, speed in meters per second.
  • Example problem: Calculate frequency given wave speed and wavelength.
  • Rearrange wave speed equation to solve for frequency: frequency = wave speed/wavelength.
  • Example calculation: frequency = 1.2 m/s divided by 0.3 m, resulting in 4 hertz.

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