Question

Rarefaction is a region of:​

• A. High pressure and low density​
• B. Low pressure and low density​
• C. High pressure and high density​
• D. Low pressure and high density​

Answer 1

The correct option is B Low pressure and low density​

Whenever an object vibrates, we see a series of compressions and rarefactions.
Compression is a region where the air particles are very close to each other causing high pressure and high density.
Rarefaction is a region where the air particles are far away from each other causing low pressure and low density.
So the correct answer is D.