Question

The given graph shows the displacement of a particle of the medium versus time relation for a disturbance travelling with a velocity of $1500\text{m/s}$. Calculate the wavelength of the disturbance.

• A. $4\text{mm}$
• B. $6\text{mm}$
• C. $3\text{mm}$
• D. $5\text{mm}$

Answer 1

The correct option is C $3\text{mm}$



From graph,

Time period , $T=2\times {10}^{-6}\text{s}$

Now, velocity of the disturbance,

$v=\frac{\lambda }{T}$

$\Rightarrow \lambda =vT=1500\times 2\times {10}^{-6}=3\times {10}^{-3}\text{m}=3\text{mm}$

Hence, option $\left(C\right)$ is the correct answer.