Physics (AS & A Level) · Oct / Nov 2020 · Paper 12 · Question 22

The speed v of waves in deep water is given by the equation v^2 = \frac{g\lambda}{2\pi} where \lambda is the wavelength of the waves and g is the acceleration of free fall. A student measures the wavelength \lambda and the frequency f of a number of these waves. Which graph should he plot to give a straight line through the origin?

1. Af^2 against \lambda
2. Bf against \lambda^2
3. Cf against \frac{1}{\lambda}
4. Df^2 against \frac{1}{\lambda}

As printed in the paper