WBCS.LIVE practice question

Among the given options, which one causes an echo?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. When sound is reflected
  2. When sound waves travel through a vacuum
  3. When sound waves travel through a solid medium
  4. When sound waves travel through a liquid medium

Correct answer and explanation

Correct answer: When sound is reflected