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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
I don't get this. You posted the equation for stationary observer and receding source. Are you now saying that this equation doesn't apply, because the problem is not a case of stationary observer and receding source? Maybe the observer is moving too, but that wasn't clear from your original post.
Account deactivated by user request on 6/11/2009. Registered Member #1071
Joined: Fri Oct 19 2007, 02:13AM
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I was just including the time it takes for the frequency emitted by the MOVING emitter to reach the STATIONARY receiver. The distance between the receiver and the emitter is 1/2*a*t^2. Since the waves travel with a speed c the time it takes for the waves to travel from the emitter to the receiver is distance/speed so call that ttravel = 1/2*a*t^2/c. That means that the waves you receive at time t where actually emitted from the emitter earlier at time t-ttravel.
My first post was just including time in the equation for the doppler shifted frequency, this correction seems to be what the question is asking for.
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Acoustic doppler effect problem
