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waves, motor, lamp, ruler, sheet of white paper - Coggle Diagram

- - - - measured in metres (m)
        
        frequency and wavelength are inversely proportional
  - - - measured in seconds (s)
  - - - measured in Hertz (Hz)
- - - - measure wavelength: take a photo of the white card and measure the length of a wave. To get a more accurate measurement you could measure the length of many waves and divide by the amount of waves you measured to get an average measurement
- - - - rarefactions are areas of low pressure due to particles being spread apart
- - - - wave speed (v) is measured in metres per second (m/s)
      - frequency (f) is measured in Hertz (Hz)
        
        hertz is vibrations per second
      - wavelength (λ) is measured in metres (m)