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Wave properties

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Wave properties

  1. 1. Wave Properties<br />7SCIENCE Mon. May 9<br />
  2. 2. Review<br />What are the two main type of wave?<br />Mechanical and electromagnetic<br />What is the difference?<br />Mechanical waves must travel through matter<br />How do you describe the shape of these waves?<br />Transverse and compressional waves<br />What are the parts of a wave?<br />Crest, trough, amplitude and wavelength<br />What type of wave are sound waves?<br />Mechanical, transverse<br />
  3. 3. Wave Properties<br />Waves have characteristics we can see and measure<br />If you see a wave in the ocean, the distance it rises above the normal level of the water is called the wave’s amplitude<br />Amplitude is half the distance between the crest and the trough in a transverse wave<br />In compressional waves, the amplitude is greater when particles are squeezed together<br />
  4. 4. Amplitude<br />A wave’s amplitude measures the amount of energy the wave carries <br />Waves with large amplitudes carry more energy than those with small amplitudes<br />Example: bright light has a greater amplitude than dim light, and sound waves that are loud have greater amplitudes than soft sounds<br />
  5. 5. Wavelength and Frequency<br />Wavelength is the distance from a crest to crest or trough to trough <br />Wavelength is important to the study of light: wavelength determines the color<br />The frequency of a wave is the number of waves that pass a point in ONE second<br />Measured in waves/second, called hertz (Hz)<br />Do short wavelengths have a higher orlower frequency? Why?<br />Why does a wave with a long wavelength have a low frequency?<br />

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