Physics (AS & A Level) · May / June 2023 · Paper 13 · Question 20

A progressive wave of frequency 1.5 kHz travels in a medium at a speed of 340 m s⁻¹. What is the minimum distance between two points on the wave that have a phase difference of 70°?

1. A4.4 cm
2. B8.8 cm
3. C18 cm
4. D23 cm

As printed in the paper