A student is investigating waves in a ripple tank. They use a meter ruler to measure the distance across 10 wavefronts projected onto a screen beneath the tank in order to determine the wavelength. Because the waves are moving, the student struggles to align the ruler accurately.
Explain one way the student could improve the accuracy of their wavelength measurement.
64 exam-style questions on Edexcel GCSE Physics 4.1 Wave properties. Each one has a worked solution and a mark scheme showing where the marks go.