Summary

• Waves & oscillations
• Resonance
• Wave definitions

• Tacoma Narrows Bridge video
• Waves
  • review definitions
  • videos
  • Wave pulse animated applet
  • speed
    Example #1
    
    Example #2
    
  
  
• Standing waves
  • Periodic wave superposition applet
  • Counterpropagating wave applet
  • Reflected wave and standing wave applet
  • chart of the harmonics applet
    Example #3
    
    Example #4
    
    Example #5
    
  
  
  
  
• Interference
  • simulation
  • water waves video
  • angle of antinodal lines
    Example #6
    
  
  
• Diffraction
  • chalk diagram
  • water waves video
  • angle of nodal lines
    Example #7
    
  
  

 
A sound wave travels through wood into aluminum, a stiffer medium than wood. The wave speed in aluminum will be ____ than the speed in wood.
   A. higher
   B. the same as
   C. lower
Answer













 
If the frequency of a periodic wave is doubled while the velocity remains the same, what happens to the wavelength?
   A. It is cut to one fourth.
   B. It is cut in half.
   C. It stays the same.
   D. It doubles.
Answer













 
How many nodes are there when a rope fixed at both ends vibrates in its fourth harmonic?
A. 3         B. 4         C. 5         D. 8
Answer













 
How much higher is the frequency of the third harmonic on a rope than that of the fundamental?
A. 3 times           B. 4 times           C. 6 times           D. 9 times
Answer













 
How does the wavelength of the fourth harmonic on a rope compare with that of the second?
   A. It's one-fourth as long.
   B. It's one-half as long.
   C. It's the same length.
   D. It's twice as long.
Answer













 
What happens to the spacing of the antinodal lines in an interference pattern when the frequency of the waves is increased?
A. The spacing increases.
B. The spacing decreases.
C. The spacing stays the same.
Answer













 
What happens to the spacing of the nodal lines in a diffraction pattern when the width of the opening is made smaller?
A. The spacing increases.
B. The spacing decreases.
C. The spacing stays the same.
Answer













 



A. higher


















 



B. It is cut in half.


















 



C. 5


















 



A. 3 times


















 



B. It's one-half as long.


















 



B. The spacing decreases.


















 



A. The spacing increases.