Required Practical · Waves

Measure wavelength and frequency, then find the wave speed
AQA Combined Science: Trilogy · Physics Paper 2
12 Hz signal generator lamp vibrating beam (dipper) screen — projected wavefronts measure 10 λ, then ÷ 10 Waves spread across the tank surface wave speed v = f λ v in m/s · f in Hz · λ in m

Put the method in the correct order