Compressions and rarefactions are characteristic of

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BlackTom AI · Accepted Answer

Let's break down what compressions and rarefactions mean in wave terminology. 
Option a: longitudinal waves. In these waves the oscillations occur parallel to the direction of travel, producing regions of high density (compressions) and low density (rarefactions) in the medium, which is exactly the hallmark described. 
Option b: transverse waves. Here the oscillations are perpendicular to the direction of travel, creating crests and troughs in the medium rather than successive compressions and rarefactions; thus, this option does not match the given characteristic. 
Option c: both of these. Since compressions and rarefactions arise specifically from longitudinal motion and not from transverse motion, this option overstates the applicability and is incorrect. 
Option d: neither of these. Given that compressions and rarefactions are a defining feature of longitudinal waves, declaring that neither type exhibits them ignores a fundamental property, making this option false. 
In summary, the characteristic description aligns with the behavior of longitudinal waves, where the medium alternates between crowded and spaced regions as the wave travels.

MUF0122 Physics Unit 2 - Semester 2, 2025 1.6 Waves basics

Compressions and rarefactions are characteristic of

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