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Homework Help: Doppler effects

  1. Nov 6, 2006 #1
    can someone plzzz explain the dopplers effect

    n when to use the c-v0 , c+v0 ,c +Vs ,c-Vs
    etc etc in the formula in the pic

    thnx a lot in advance

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  2. jcsd
  3. Nov 7, 2006 #2


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    Homework Helper

    When in doubt, think about only one velocity being other than zero. Source moving away, frequency drops- positive. Source moving toward you, frequency rises- negative, You move toward source, frequency rises- positive. You move away from source, frequency drops- negative.
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