alleryStart learning →What happens to the Doppler shift as the moving source travels faster?
AThe shift becomes greater
BThe shift becomes smaller
CThe shift stays unchanged
DThe shift reverses direction
Answer & Solution
Correct answer: A. The shift becomes greater
1. The Doppler shift comes from the source moving between one emission and the next.
2. The faster the source moves, the greater the shift heard.
3. Being closer to the source also makes the change more sudden.
4. The same shift is heard for passing race cars, aeroplanes and trains.
_Source: OpenStax Physics (high school, CC BY 4.0), Ch 14 "Sound", section 14.3 Doppler Effect and Sonic Booms_
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