... of the slinky and the wave will travel through and eventually reach the other end of the slinky and the presence of my partner's hand. The wave will then undergo 'reflection'. The wave will remain within the medium (slinky) but just reverse the direction of travel. A slinky wave which travels to the end of a slinky and back has doubled its distance. That is, by reflecting back to the original location, the wave has travelled a distance which is equal to twice the length of the slinky. There will be two ways in which I can deliver the wave through the medium. I can either create a to and fro motion wave (longitudinal) or create a side to side wave (transverse). I have chosen to create a transverse wave as it is much easier to see travelling through the slinky. The above diagrams shows a longitudinal wave travelling through the slinky. ...

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