Question

Distance between the 1st compressions and the fifth subsequent rarefaction in a longitudinal wave if the wavelength of the wave is 20 cm

Answer 1

Dear Student ,
Here in this case ,
$$\begin{gathered} Dis\tan cebetweenthe1stcompressionand5thsubsequentrarefactionis, \\ d=\frac{\lambda }{2}+4\lambda =\frac{9\lambda }{2}=\frac{9\times 20}{2}=90cm \end{gathered}$$
Regards