Physics

Problem

During the passage of a sound wave through air, which one of the following statements about compressions (C) and rarefactions (R) is correct? a)

\text{Compressions are regions of minimum pressure while rarefactions are regions of maximum pressure}

\text{The distance between a compression and the next rarefaction is }\tfrac{\lambda}{4}

\text{Compressions and rarefactions are separated by a distance equal to }\tfrac{\lambda}{2}

\text{Air particles travel from one compression to the next carrying the sound energy forward}