Question

When source and detector are stationary and wind blows at speed $V_w=10m/s$, speed of sound is $v=330m/s$. Find apparent wavelength of sound in direction of wide if wavelength of sound is 33 m

• A. $33m$
• B. $1m$
• C. $34m$
• D. $\frac{1089}{32}m$

Answer 1

The correct option is D $\frac{1089}{32}m$

$\begin{array}{c}\frac{v_1}{{\lambda }_1}=\frac{v_2}{{\lambda }_2}\\ \Rightarrow \frac{320}{33}=\frac{330}{{\lambda }_2}\\ \Rightarrow {\lambda }_2=\frac{33\times 33}{32}\\ =\frac{1089}{32}m\\ Hence,optionDisthecorrectanswer.\end{array}$