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Pulse Behavior through Different Media (Grades 11-12)

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Pulse Behavior through Different Media

Instructions: Read each question carefully. Choose the answer that best fits the question. Short answer response questions must be responded to in complete sentences. If the question involves calculations, you must show all your math work.

1. 
Pulse with Media of Different Densities
If a pulse originates from the left-side, less dense end of a rope, a portion of the energy carried by the incident pulse is reflected and returns, inverted, towards the left-side, less dense end of the rope. What is the disturbance that returns to the left after bouncing off the boundary known as?
  1. the inverted pulse
  2. the incident pulse
  3. the transmitted pulse
  4. the reflected pulse
2. 
Pulse with Media of Different Densities
In which end of the rope is the wave speed is always greatest?
  1. in the less dense end
  2. in the more dense end
  3. Wave speed is the same throughout.
3. 
Pulse with Media of Different Densities
If a pulse originates from the left-side, less dense end of the rope, a portion of the energy carried by the incident pulse is transmitted into the thick rope. What is the disturbance that continues moving to the right known as?
  1. the reflected pulse
  2. the transmitted pulse
  3. the incident pulse
  4. the inverted pulse
4. 
Pulse with Media of Different Densities
In which end of the rope is the wavelength is always greatest?
  1. in the less dense end
  2. in the more dense end
  3. Wavelength is the same throughout.
5. 
If an incident pulse transmits from the more dense medium, that transmitted pulse is traveling more slowly than the reflected pulse in the less dense medium.
  1. True
  2. False
6. 
Pulse with Media of Different Densities
The transmitted pulse in the less dense medium has a smaller wavelength than the reflected pulse in the more dense medium.
  1. True
  2. False
7. 
Pulse with Media of Different Densities
The speed and the wavelength of the reflected pulse are the same as the speed and the wavelength of the incident pulse.
  1. True
  2. False
8. 
Pulse with Media of Different Densities
Explain in which situation will the reflected pulse of an incident pulse will become inverted.



9. 
Explain why the original frequency of a wave is not altered by crossing a boundary where there is a change in media density, and reflecting back.



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