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Waves



Wednesday, March 25, 2009
There are two kinds of waves:




Wednesday, March 25, 2009
There are two kinds of waves:

                 Electromagnetic (EM) Waves: Waves that can
                 self-propagate; it doesn’t need a medium.
                 Radio waves, UV, X-Rays and etc.




Wednesday, March 25, 2009
There are two kinds of waves:

                 Electromagnetic (EM) Waves: Waves that can
                 self-propagate; it doesn’t need a medium.
                 Radio waves, UV, X-Rays and etc.

                 Mechanical Waves: Is a disturbance that travels
                 through a medium where the adjacent
                 particles in the medium can somehow
                 influence one another.


Wednesday, March 25, 2009
Wednesday, March 25, 2009
Let’s Take a Look




Wednesday, March 25, 2009
Let’s Take a Look
               Let’s observe the different kinds of mechanical
               waves:




Wednesday, March 25, 2009
Let’s Take a Look
               Let’s observe the different kinds of mechanical
               waves:

                   • Transverse Wave - Link
                   • Longitudinal Wave - Link


Wednesday, March 25, 2009
Wednesday, March 25, 2009
Note that there are no matter transfers in mechanical
      waves. Progressive (traveling) waves transfer energy.




Wednesday, March 25, 2009
Note that there are no matter transfers in mechanical
      waves. Progressive (traveling) waves transfer energy.




Wednesday, March 25, 2009
Note that there are no matter transfers in mechanical
      waves. Progressive (traveling) waves transfer energy.




Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wavelength: The distance between 2 adjacent points
     that are in phase with each other. Designated by the
     greek letter lambda (λ).




Wednesday, March 25, 2009
Wavelength: The distance between 2 adjacent points
     that are in phase with each other. Designated by the
     greek letter lambda (λ).

     Frequency: The number of cycle that pass a specific
     point in a unit of time (Hz). It’s determined by the
     source of the wave.




Wednesday, March 25, 2009
Wavelength: The distance between 2 adjacent points
     that are in phase with each other. Designated by the
     greek letter lambda (λ).

     Frequency: The number of cycle that pass a specific
     point in a unit of time (Hz). It’s determined by the
     source of the wave.

     Period: The time to complete one cycle of the wave.




Wednesday, March 25, 2009
Wavelength: The distance between 2 adjacent points
     that are in phase with each other. Designated by the
     greek letter lambda (λ).

     Frequency: The number of cycle that pass a specific
     point in a unit of time (Hz). It’s determined by the
     source of the wave.

     Period: The time to complete one cycle of the wave.

     Phase: It’s the fraction of a complete cycle
     corresponding to an offset in the displacement.

Wednesday, March 25, 2009
Wednesday, March 25, 2009
speed = distance/time




Wednesday, March 25, 2009
speed = distance/time

        wave speed = wavelength/period = wavelength x frequency




Wednesday, March 25, 2009
speed = distance/time

        wave speed = wavelength/period = wavelength x frequency


                                  v=λxf




Wednesday, March 25, 2009

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Mechanical Waves

  • 2. There are two kinds of waves: Wednesday, March 25, 2009
  • 3. There are two kinds of waves: Electromagnetic (EM) Waves: Waves that can self-propagate; it doesn’t need a medium. Radio waves, UV, X-Rays and etc. Wednesday, March 25, 2009
  • 4. There are two kinds of waves: Electromagnetic (EM) Waves: Waves that can self-propagate; it doesn’t need a medium. Radio waves, UV, X-Rays and etc. Mechanical Waves: Is a disturbance that travels through a medium where the adjacent particles in the medium can somehow influence one another. Wednesday, March 25, 2009
  • 6. Let’s Take a Look Wednesday, March 25, 2009
  • 7. Let’s Take a Look Let’s observe the different kinds of mechanical waves: Wednesday, March 25, 2009
  • 8. Let’s Take a Look Let’s observe the different kinds of mechanical waves: • Transverse Wave - Link • Longitudinal Wave - Link Wednesday, March 25, 2009
  • 10. Note that there are no matter transfers in mechanical waves. Progressive (traveling) waves transfer energy. Wednesday, March 25, 2009
  • 11. Note that there are no matter transfers in mechanical waves. Progressive (traveling) waves transfer energy. Wednesday, March 25, 2009
  • 12. Note that there are no matter transfers in mechanical waves. Progressive (traveling) waves transfer energy. Wednesday, March 25, 2009
  • 14. Wavelength: The distance between 2 adjacent points that are in phase with each other. Designated by the greek letter lambda (λ). Wednesday, March 25, 2009
  • 15. Wavelength: The distance between 2 adjacent points that are in phase with each other. Designated by the greek letter lambda (λ). Frequency: The number of cycle that pass a specific point in a unit of time (Hz). It’s determined by the source of the wave. Wednesday, March 25, 2009
  • 16. Wavelength: The distance between 2 adjacent points that are in phase with each other. Designated by the greek letter lambda (λ). Frequency: The number of cycle that pass a specific point in a unit of time (Hz). It’s determined by the source of the wave. Period: The time to complete one cycle of the wave. Wednesday, March 25, 2009
  • 17. Wavelength: The distance between 2 adjacent points that are in phase with each other. Designated by the greek letter lambda (λ). Frequency: The number of cycle that pass a specific point in a unit of time (Hz). It’s determined by the source of the wave. Period: The time to complete one cycle of the wave. Phase: It’s the fraction of a complete cycle corresponding to an offset in the displacement. Wednesday, March 25, 2009
  • 20. speed = distance/time wave speed = wavelength/period = wavelength x frequency Wednesday, March 25, 2009
  • 21. speed = distance/time wave speed = wavelength/period = wavelength x frequency v=λxf Wednesday, March 25, 2009

Notes de l'éditeur