Physics

EU6D 2015-02-05 Standing Waves

Created 3 years ago

Duration 0:58:21
26
Learning about standing waves
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Tags: Physics
1. Slide 1 - EU 6.D: Interference and superposition lead to standing waves and beats.

• Mr. Weisenfeld

3. 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.

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. 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. 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. 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.

14. Slide 26

• Hecht, Section 11.10, pg 400, Example 11.12

16. 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?