Physics (AS & A Level) · May / June 2021 · Paper 12 · Question 26

A pipe of length L is open at one end and closed at the other end. A loudspeaker is at the open end and emits a sound wave into the pipe. When a stationary wave is formed, there is an antinode at the open end of the pipe. Which wavelength of sound could be used to produce a stationary wave?

1. A\frac{2L}{3}
2. BL
3. C\frac{4L}{3}
4. D2L

As printed in the paper