Shock Wave Front: How Does Source Movement Create Waves?

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SUMMARY

The discussion centers on the phenomenon of shock waves generated by a moving source, particularly when it exceeds the speed of sound. It confirms that even in the absence of vibration, movement of the source creates disturbances in the medium. The concept of the Doppler effect is crucial, as it explains how the source remains ahead of the sound waves it produces, leading to wave superposition behind the source. The term "Sonic Boom" is also referenced, highlighting the audible result of such shock waves.

PREREQUISITES
  • Understanding of shock wave theory
  • Familiarity with the Doppler effect
  • Basic knowledge of wave propagation in mediums
  • Concept of sonic booms and their implications
NEXT STEPS
  • Research the mathematical principles behind shock wave formation
  • Study the Doppler effect in various mediums
  • Explore the physics of sonic booms and their environmental impact
  • Investigate applications of shock waves in technology and engineering
USEFUL FOR

Physics students, aerospace engineers, and anyone interested in the dynamics of sound and wave propagation.

tina21
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Homework Statement
When a vibrating source moves through a medium with speed V, speed of propagation of wave is v. A conical wavefront is set up independent of time. What happens when the source is not vibrating?
Relevant Equations
Sin(theta) = v/V
So when the source is not vibrating, it is not setting waves due to vibration? But it is moving so it is still causing disturbance in the medium ... And I happened to read that if the source is moving faster than the speed of sound, a shock wave is set up. How ?
 
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Read about Doppler's effect; the shock wave is there because the source is always ahead of the sound wave it creates; behind the source, there will be a region where waves superimpose; sketch the moving plane, sketch few wave fronts and you will see how they combine. Look up Sonic Bum.
 
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I understand now. Thank you so much :smile:
 

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