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  • Sound is a form of energy that is produced by producing vibrations in an object.

  • Sound cannot move through vacuum.

  • Sound is a wave that requires a medium for its propagation. The medium particles vibrate only to and fro. They do not move with the sound.



  • Longitudinal wave: Individual particles of the medium move in the direction  parallel to the direction of wave propagation


  • Transverse wave: Particle movement is perpendicular to the direction of wave propagation


  • Sound waves propagat…

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