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Pradeep Jogsan posted an Question
December 21, 2020 • 17:45 pm 30 points
  • IIT JAM
  • Physics (PH)

Doubt in changing signs of velocities?????

In Gene f=+)t Vo (v+V)TVsJ Apparent frequency In case of stationary medium v = 0 f's VVolt vTVsJ where Vo Observer velocity Vs SOurce velocity f actual frequency V = velocity of sound ) When source moves towards stationary observ Vs+) S O V-Vs i) When sources moves away from stationary obs Vs(-) S O f'= v LV+ Vs (ii) When observer moves towards stationary source= Vo-) S O

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    Ruby negi best-answer

    just, keeping these two statements in mind, take the velocities of observer and sources as I said, without seeing their velocities, u will get accurate answer..

  • comment-profile-img>
    Ruby negi

    all formulas are right ,no need to get confuse.. just learn them.

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    I know these are right

    eduncle-logo-app

    but how velocities sign varies....I didn't get it

    eduncle-logo-app

    when source is going away from observer than velocity of source is +v even when observer is moving away or towards it, similarly when source is moving towards observer,it's velocity is -v

    eduncle-logo-app

    when observer is going away from source then velocity of observer is -v even when source is moving away or towards it, similarly when observer is moving towards source,it's velocity is +v..

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