P11 - Wave Properties.

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P11 - Wave Properties.

P11 - Wave Properties.

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P11.1 - The nature of waves.

  • transfer energy and info
  • Transverse waves - perpendicular to direction of energy transfer.
  • Ripples on water are transverse.
  • transverse - electromangnetic
  • Longitudinal - parallel to energy transfer. 
  • mechanical waves need a medium to travel through.
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11.2 - Properties of waves.

  • Frequency = number of waves passing a point per second
  • Period = 1

                ------

             frequency

speed of a wave = frequency in Hz x wavelength in m.

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11.2 - Properties of waves.

Image result for properties of waves

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11.3 - Reflection and Refraction.

Image result for reflection and refraction (http://9-1obrien.wikispaces.com/file/view/refraction-reflection-of-light.jpeg/249595190/refraction-reflection-of-light.jpeg)

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11.4 - More about waves.

  • sound waves are vibrations that travel through a medium. 
  • sound waves CANNOT travel through VACCUMS.
  • To investigate waves use:
  • Water tank
  • A streched string for waves in a solid.
  • A signal generator and loudspeaker for sound waves.
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