PRACTICAL: Ripple Tank (6 stages)

1) Set up ripple tank with 5cm depth of water 2) Adjust height of the wooden rod so it just touches the surface of the water 3) Switch on lamp and motor & adjust until low frequency waves can be clearly observed 4) Measure length of a number of waves then divide by the number of waves to record wavelength. Or you can take a photograph of the card with the ruler and take measurements from the still picture 5) Count the number of waves passing a point in ten seconds then divide by ten to record frequency 6) Calculate speed of the waves using: wave speed = frequency × wavelength