Physics (AS & A Level) · Feb / March 2024 · Paper 12 · Question 26

A source of sound waves with constant frequency moves towards a stationary observer. The observer compares the sound waves arriving at the observer's position with the waves emitted by the source of sound. What is detected by the observer?

1. Aa decreased frequency of the sound waves
2. Bno change in frequency of the sound waves
3. Ca decreased wavelength of the sound waves
4. Dno change in wavelength of the sound waves

As printed in the paper