Question

Distance between compression and consecutive rarefaction is $100m$. Calculate the wavelength of the wave.

• A. $100m$
• B. $50m$
• C. $200m$
• D. $400m$

Answer 1

The correct option is C $200m$

Wavelength $\lambda$ of a wave is defined as the distance between two consecutive compressions or rarefactions. As we know that between two consecutive compressions, there is a rarefaction or vice-versa, therefore the distance between compression and consecutive rarefaction will be $\frac{\lambda }{2}$.

Given, $\frac{\lambda }{2}=100m$ ,

or, $\lambda =2\times 100=200m$