**Question:**

Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is $340 \mathrm{~m} \mathrm{~s}^{-1}$, calculate

(i) wavelength when frequency is $256 \mathrm{~Hz}$.

(ii) frequency when wavelength is $0.85 \mathrm{~m}$. (CBSE 2012)

**Solution:**

Refer Article 6.2.5. (i) $\lambda=\frac{v}{v}=\frac{340}{256}=1.33 \mathrm{~m}$

(ii) $v=\frac{v}{\lambda}=\frac{340}{0.84}=400 \mathrm{~Hz}$.