Question

The linear distance between the compression and the adjacent rarefaction is $0.8m$. The wavelength of the longitudinal wave is

• A. $0.8m$
• B. $1.6m$
• C. $0.4m$
• D. $3.2m$

Answer 1

The correct option is B $1.6m$

Wave length $\lambda$ is defined as the distance between two successive compressions or rarefactions , therefore the distance between two successive compression and rarefaction will be $\lambda /2$ ,

now given , $\lambda /2=0.8$ ,

or $\lambda =2\times 0.8=1.6m$