Physics (AS & A Level) · Oct / Nov 2016 · Paper 12 · Question 24

A transverse progressive wave of wavelength λ is set up on a stretched string. The graph shows the variation of displacement y with distance x at a particular instant of time. The displacement where distance x = λ/8 is y1. What are the next two values of x where the displacement y is again equal to y1?

1. A3λ/8 and 5λ/8
2. B3λ/8 and 9λ/8
3. C5λ/8 and 9λ/8
4. D9λ/8 and 17λ/8

As printed in the paper