The doppler effect

The doppler effect

Storyboard Text

  • Hey Matt do you hear that ambulance
  • Yes I do
  • Katie why does the sirens sound different as the ambulance drives away to how they sound when the ambulance is stationery outside our house.
  • Well that is called the doppler effect
  • How does that work?
  • When the ambulance moves towards us the frequency of the sound waves increases
  • When the ambulance moves away from us the sound waves are stretched out which makes the frequency get lower as it moves away.
  • All good
  • Thanks sis now I know how the doppler effect works
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