Practice Doppler Effect (hl Additional Content) (C.5)

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9 questions

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6 sample questions

Question 1.
What is the Doppler Effect?
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Think about what happens when a train passes by.
Question 2.
What happens to the frequency of sound when the source is moving towards an observer?
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Recall the term 'blue shift'.
3Question 3.
What happens to the frequency of sound when the source approaches the observer?
- Increases
- Decreases
- Stays the same
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Think of a passing ambulance.
4Question 4.
True or False: A red shift indicates that an object is moving closer.
- True
- False
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What does 'red' in red shift imply?
Question 5.
A ship sounding a horn with a frequency of 300 Hz moves towards a stationary observer at 15 m/s, while the speed of sound is 340 m/s. Calculate the observed frequency.
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Plug in the values carefully to find the observed frequency.
Question 6.
A star emits light at a wavelength of 600 nm. If it is receding at a velocity of 30,000 km/s, calculate the new wavelength.
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Check the speed of light value and remember to add the change to the original wavelength.

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