3.8 understand that waves can be diffracted as they pass an edge

  • Ripple tank – device used to study the behaviour of waves. Waves can either be reflected, refracted or diffracted


  • Reflected waves – shown by the placement of a barrier which will reflect the waves back to the source of motion
  • Refracted waves – shown by a change in depth and changes the speed of the wave
  • Diffracted waves – the bending of the waves as they pass an obstacle. 
  • Process of diffraction –
  1. Edges of the wave ‘bend’ to get through the gap
  2. This causes the waves to spread out, allowing the waves to travel around the corners
  3. The amount of diffraction is dependant on the size of the gap and the wavelength of the wave1.png

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