Question

what is it called when particles in a longitudinal wave come closer together?
translation
rarefraction
compression

Explanation:

• Translation: This term is related to moving an object from one place to another in a straight line in the context of motion in general, not specifically about particle behavior in longitudinal waves.
• Rarefaction: In a longitudinal wave, rarefaction is the region where particles are spread apart, not when they come closer together.
• Compression: In a longitudinal wave, compression is the region where particles are pushed closer together.

Answer:

Compression