Question

Propagation of sound can be visualised as:

• A. propagation of density variations
• B. propagation of pressure variations
• C. a series of compressions and rarefactions
• D. all of the above

Answer 1

The correct option is D

all of the above

During vibration, when a particle moves forward, it compresses the air in front of it and creates a high-pressure or high-density region. This region is called compression. When a particle moves backwards, it creates a low-pressure or low-density region. This region is called rarefaction.