Question

If equation of sound Wave is $y=0.0015sin(62.4x+316t)$, then its wavelength will be

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

Answer 1

The correct option is C $0.1$ unit

$y=0.0015sin(62.8x+314t)$
Comparing it with the equation
$y=asin(\omega t+kx)$
$\omega =314,k=62.8$
$k=\frac{2\pi }{\lambda }=62.8\Rightarrow \lambda =\frac{2\pi }{62.8}=0.1$ unit