Physics (AS & A Level) · Oct / Nov 2020 · Paper 11 · Question 21

A guitar string vibrates to create a sound. The speed of the wave in the guitar string is always 440 m s–1. The vibrating string creates a sound wave that moves in the air with a speed of 330 m s–1. Which graph shows the variation of frequency f with the wavelength λ for the waves in the string and in the air?

1. Agraph A
2. Bgraph B
3. Cgraph C
4. Dgraph D

As printed in the paper