EU6D 2015-02-05 Standing Waves

Learning about standing waves

Physics
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EU6D 2015-02-05 Standing Waves

Created 3 years ago

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Learning about standing waves
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  1. EU 6.D:  Interference and superposition lead to standing waves and beats.

    Slide 1 - EU 6.D: Interference and superposition lead to standing waves and beats.

    • Mr. Weisenfeld
  2. What is a standing wave. (Does not work in video)

    Slide 3 - What is a standing wave. (Does not work in video)

  3. http://www.walter-fendt.de/ph14e/stwaverefl.htm

    Slide 6 - http://www.walter-fendt.de/ph14e/stwaverefl.htm

    • Red wave, is the “incident wave” it is moving to the right.
    • Blue wave is the “reflected wave” which is moving to the left.
    • Black wave is the resultant wave, or “standing wave”.
    • “N” stands for node.
    • “A” stands for antinode.
  4. Conditions for a standing wave.

    Slide 7 - Conditions for a standing wave.

  5. Slide 9

    • http://www.cabrillo.edu/~jmccullough/Applets/OSP/Oscillations_and_Waves/waves_standing.jar
  6. Slide 12

    • Hecht, Section 11.10, pg 399
  7. Converting an equation to words (1 of 3)

    Slide 13 - Converting an equation to words (1 of 3)

    • “The length of the string contains some numberof one-half wavelengths . ”
    • What is in this case?
  8. Converting an equation to words (2 of 3)

    Slide 14 - Converting an equation to words (2 of 3)

    • “The string, divided up evenly into parts, will have a one-half wavelength on each part.
    • What is in this case?
  9. Converting an equation to words (3 of 3)

    Slide 15 - Converting an equation to words (3 of 3)

    • “If the string were twice as long , it would have total number of wavelengths .
    • What is in this case?
  10. Slide 17

    • Hecht, Section 11.10, pg 399, Figure 11.41
  11. Slide 18

    • Hecht, Section 11.10, pg 399, Figure 11.41
  12. Slide 19

    • A Standing Wave on a String Experiment.
  13. [From Section 11.2 in Hecht] (need this next)

    Slide 21 - [From Section 11.2 in Hecht] (need this next)

  14. Slide 26

    • Hecht, Section 11.10, pg 400, Example 11.12
  15. Cool Pictures

    Slide 27 - Cool Pictures

  16. Chladni patterns

    Slide 28 - Chladni patterns

    • Not just the strings of a violin vibrate!
  17. Slide 29

    • Which mode of oscillation do you need to excite, (i.e. what is N) for the wineglass when it breaks?
  18. Can you make a standing wave?

    Slide 32 - Can you make a standing wave?