Wavelength of sound affected by the moving observer?

AI Thread Summary
The wavelength of sound is influenced by the motion of the observer due to the principles of relative velocity. When an observer moves, they effectively change their frame of reference, making the sound source appear to move relative to them. This shift alters the perceived wavelength of the sound waves. The discussion emphasizes that both the observer and the source can be considered stationary depending on the chosen frame of reference. Understanding this concept is crucial for grasping how sound waves behave in different scenarios.
desmond iking
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Homework Statement



why the wavelength of sound is affected by the moving observer? because as the observer move, the sound source is still stationary . so in my opinion it's not affected by the moving observer. the ans is C for this question. i can't understand.

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The Attempt at a Solution

 

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The source is still "stationary" but you could easily change your perspective so that you are "stationary" and then the source would be moving.

In other words, it is only relative velocity that is important (because one frame of reference is not better than the other)
 

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