Physics (AS & A Level) · May / June 2020 · Paper 11 · Question 22

A sound wave reduces in intensity but maintains a constant frequency as it travels through air. Which statement is correct?

1. AThe maximum displacement of the particles changes between one particle and the next particle.
2. BThe phase difference between adjacent particles is zero.
3. CThe wavelength is the distance between two particles that have a phase difference of 180°.
4. DTwo particles that have a phase difference of 360° have the same maximum displacement.

As printed in the paper