Question

If the wave speed is $0.5m/sec$ and the wavelength is $\lambda m$.Find out the Time period of the wave (in seconds) given in above figure?

• A. $\frac{1}{4\lambda }$
• B. $\frac{1}{2\lambda }$
• C. $\frac{1}{\lambda }$
• D. $2\lambda$
• E. $4\lambda$

Answer 1

Answer: (D)

$2\lambda$

We know that velocity of wave , $v=$ frequency $\left(f\right)\times$ wavelength $\left(\lambda \right)$

or $f=\frac{v}{\lambda }=\frac{0.5}{\lambda }$

Time period , $T=1/f=2\lambda$