science assigment
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- WEE WOO WEE WOO!
- Ambulance sits outside Katie and Matts neighbours' house for 10 minutes with sirens on
- 🔊🔊🔊
- The siren is so loud!
- I know right!
- Ambulance rushes off and the pitch changes dramatically
- WHOOSH!
- Hey Katie, why does the siren sound so different now that its driven off?
- Well if you listened in science, you would know that it is because of the doppler effect... but i'll get my science book out and explain.
- When the source (the ambulance) is approaching or near the observer (us), the wavelengths are compressed together, resulting in a more frequent and high pitched siren like what we heard when it sat outside our house!
- THE DOPPLER EFFECT 11/11/21SCENARIO 1 - MOVING TOWARDS THE OBSERVERTHE SOURCE OF SOUND OBSERVER WAVELENGTH
- Okay, but why did the pitch get lower when it drove off?
- I havent finished explaining yet...
- *Katie reopens her book*
- On the flip side, when the source (the ambulance) is moving away from observer (us), the wavelengths are spread apart, resulting in a less frequent and low pitch siren like what we heard when it drove off!
- THE DOPPLER EFFECT 11/11/21SCENARIO 2 - MOVING AWAY FROM THE OBSERVERTHE SOURCE OF SOUND OBSERVER WAVELENGTH
- That makes so much more sense now! Thanks Katie
- Thats all good!
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