Question

In Doppler effect when the source is moving away from the observer at rest, the correct equation is:

• A. $f^{\prime }=f\left(\frac{v-v_s}{v+v_s}\right)$
• B. $f^{\prime }=f\left(\frac{v_s}{v+v_s}\right)$
• C. $f^{\prime }=f\left(\frac{v}{v+v_s}\right)$
• D. None of the above

Answer 1

The correct option is C $f^{\prime }=f\left(\frac{v}{v+v_s}\right)$

Source moving away from observer:

$f^{\prime }=f\left(\frac{v_{wave}}{v_{wave}+v_s}\right)$