Cards (3)

    • why do we do it?
      to measure wavelength, frequency + speed of water waves
    • equipment needed?
      ripple tank, lamp, vibrating bar, power pack, water, ripple tank, white paper.
      bar vibrates = waves on surface
      phone to record
    • method
      place a ruler on the paper - freeze image
      measure the distance between one wave and ten waves further = total of ten wavelengths
      to find the frequency, place timer next to the paper and count the number of waves passing a point in one second.
      easiest to count number in 10 seconds then divide by 10