Question

The equation of sound wave is $y=0.0015sin(62.4x+316t)$. Find the wavelength of this wave :

• A. $0.2$ unit
• B. $0.1$ unit
• C. $0.3$ unit
• D. none of these

Answer 1

The correct option is B $0.1$ unit

The equation for sound wave is given as $y=0.0015sin(62.4x+316t)$

On comparing with $y=Asin(kx+wt)$, we get $k=62.4$

Let the wavelength of the wave be $\lambda$.

$\therefore$ $\frac{2\pi }{\lambda }=62.4$ $⟹\lambda =0.1$ unit