Multiple choice

An echo is heard due to the _________ of sound waves.

  1. reflection

  2. diffraction

  3. interference

  4. refraction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An echo occurs when sound waves reflect off a surface and return to the listener after a noticeable delay. The reflected sound must be separate from the original sound, requiring sufficient distance and a good reflecting surface.

Keep practicing — related questions