Page 4 - WAVES
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6.1   Waves


  What is waves ?                                                            How do waves transfer energy?


   a disturbance or variation that transfers                                 When energy is transferred by a wave
   energy progressively from point to point in                               from a vibrating source to a distant

   a medium                                                                  receiver, there is no transfer of matter

                                                                             between the two points.

     Type :


       • Sound
              by vibrating mechanical bodies                                 Example

              such as a guitar strings or a
              tuning fork



       • Light
              result of vibrations of electrons in

              an atom



       • Water
              by a disturbance on a still  water
              surface                                                         When the string is shaken up and down, a

                                                                              disturbance moves along the length of the

                                                                              string. It is the disturbance that moves
                                                                              along the length of the string, not parts of

                                                                              the string itself.


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