Vibrations and Waves

1
Vibrations and Waves

• Waves

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Waves

• A ___________ moving through a medium
• Doesnt carry the ________ with it
• Disturbance can ____________
• Perpendicular to direction of motion
• Disturbance can be ______________
• Parallel to direction of motion
• Carry energy and ___________

3
Describing Waves

• Use amplitude, A, frequency, f, and period T
• Also wave speed, v, and wavelength, ?
• Wavelength is _________ between successive
  crests/troughs
• Wave speed is speed at which a _____/______ moves
  through the medium

Speed of waves on a string
4
Interference of Waves

• As two waves pass each other the resultant is
  found by adding displacements at every point

Fig. 13.30, p. 449
Fig. 13.29, p. 449
Constructive Interference
Destructive Interference
5
Reflection of Waves

• The ________ of a wave can change on reflection

Fig. 13.34, p. 450
Fig. 13.35, p. 450
Fixed End Reflected pulse is ________
Free End Reflected pulse is ___ _______