Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Rearrange Doppler Equation

  1. May 23, 2015 #1
    Hi,
    So i know that the doppler equation is as follos;

    F(observed)= (Vsound + Vdetector) / (Vsound +- Vsource) x F(emitted)

    Does anyone know how to reaarange the equation to solve for the other variables?
     
  2. jcsd
  3. May 23, 2015 #2

    QuantumCurt

    User Avatar
    Education Advisor

    You can solve algebraically for any of the quantities that you want. It's best do this after clarifying what signs you will be using in the top and bottom.

    $$f=\frac{v_s \pm v_d}{v_s \mp v_d}f_0$$

    Suppose that your quantities tell you to put a plus in the numerator and a minus in the denominator. Then you get:

    $$f=\frac{v_s +v_d}{v_s-v_d}f_0$$

    Then you can solve algebraically for whatever variable you'd like. It's easier to do this after defining your sign conventions in most cases, but won't make a difference in all of them.

    Are you trying to solve for a specific variable?

    edit-by the way, it's conventional to use a lowercase ##f## to signify frequency. An uppercase ##F## typically represents force.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Rearrange Doppler Equation
  1. Doppler Effect (Replies: 2)

  2. Doppler Effect (Replies: 3)

Loading...