GCSE Combined Science (AQA)

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Frequency

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Waves Waves in air, fluids and solids

Frequency

4:05 Properties of Waves
Spec 4.6.1.2
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  • Frequency of a wave is the number of full wavelengths passing a point in a second.
  • A wave transfers energy from one place to another without transferring matter.
  • In a transverse wave, matter moves up and down, forming a repeating pattern.
  • Wavelength is the distance across which there is exactly one cycle of the wave pattern.
  • Frequency is measured by counting the number of peaks passing a point in one second.
  • Example: If two peaks pass a point each second, the wave has a frequency of two hertz.
  • Hertz is the standard unit for frequency, meaning cycles per second.
  • Frequency can also be defined as the number of times the motion of matter in the wave repeats in a second.
  • Observing a single oscillating particle in the wave can help measure frequency.
  • Measuring frequency over several seconds can improve accuracy.
  • Frequency is determined by how quickly waves are produced.
  • Example: A person flicking a spring creates waves; the rate of flicking determines wave frequency.
  • Understanding frequency and how to measure it is important for exams.
  • Frequency affects the properties of a wave.

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