Question

When we say that sound travels in a medium, what do we mean?

• A. The particles of the medium travels.
  
• B. The source travels.
• C. The disturbance travels.
• D. The medium travels.

Answer 1

The correct option is C The disturbance travels.

When sound waves travel in medium, they create compressions and rarefactions which move. Compressions and rarefactions are created by to and fro motion of the particles of the medium. The medium or the particles of the medium do not travel, only the particles of medium do to and fro motion at their mean position.