High-pressure regions in a longitudinal wave are known as

High-pressure regions in a longitudinal wave are known as

• A. Compressions
• B. Rarefactions
• C. Oscillations
• D. Distortions

Answer: (A)

In a longitudinal wave, the medium's particles move parallel to the direction of travel, creating alternating regions of high and low pressure. The high-pressure, densely packed parts are called compressions because the particles are squeezed together, raising the local pressure above ambient. Right after a compression, the particles spread out, producing a region of lower pressure called a rarefaction. So the best term for the high-pressure region is compression. Oscillations describe the back-and-forth motion of particles in the wave, not specifically the high-pressure areas, and distortions isn’t the standard term for these regions.

In a longitudinal wave, the medium's particles move parallel to the direction of travel, creating alternating regions of high and low pressure. The high-pressure, densely packed parts are called compressions because the particles are squeezed together, raising the local pressure above ambient. Right after a compression, the particles spread out, producing a region of lower pressure called a rarefaction. So the best term for the high-pressure region is compression. Oscillations describe the back-and-forth motion of particles in the wave, not specifically the high-pressure areas, and distortions isn’t the standard term for these regions.