Question

If equation of sound wave is $y=0.0015\sin (62.8x+314t)$ then its wavelength will be:

• A. $0.1$ unit
• B. $0.2$ unit
• C. $0.3$ unit
• D. $2$ unit

Answer 1

The correct option is A $0.1$ unit

Given:- $y=0.0015\sin (62.8x+314t)$
As we know that,

$y=A\sin (wt-kx)$
$k=62.8=\frac{2\pi }{\lambda }$
$\lambda =0.1$ unit