Physics - Sound Wave Question with Solution | TestHub

${\text{n}}_1={\text{n}}_0\left\{\frac{\text{v}-{\text{v}}_0}{\text{v}-{\text{v}}_s}\right\}=800\left\{\frac{320-2}{320}\right\}=\frac{800\times 318}{320}\text{Hz}$
${\text{n}}_2={\text{n}}_0\left\{\frac{\text{v}-{\text{v}}_0}{\text{v}-{\text{v}}_s}\right\}=800\left\{\frac{320+2}{320}\right\}=\frac{800\times 322}{320}\text{Hz}$
$\therefore$Beat frequency = n₂– n₁
$=\frac{800\left(322-318\right)}{320}$
$=\frac{800\times 4}{320}=10\text{Hz}$