Question

the following diagram shows particles in a medium and how they were moved as a result of a sound passing through it. the diagram shows a \freeze\ frame of the medium and soundwave interaction.
which soundwave passed through this medium?
a
b
c

Explanation:

Sound waves are longitudinal waves, where particle compression (closer particles) corresponds to wave crests, and rarefaction (spread-out particles) corresponds to wave troughs. The given medium has evenly spaced compression-rarefaction regions, matching the wavelength of option B. Option A has a longer wavelength, and option C has a shorter, more compressed wavelength that does not align with the particle spacing in the diagram.

Answer:

B. <The wave with a medium wavelength, 4 full oscillations in the shown length>