Question

Echo is produced due to

• A. reflection of sound
• B. refraction of sound
• C. resonance
• D. none of these

Answer 1

The correct option is A

reflection of sound

Reflection of sound:

1. The utterance of sound developed by the reflection of sound waves from an obstacle is known as an echo.
2. Echoes may be heard more than once due to successive or multiple reflections.
3. The sensation of any sound remains in our ear for about 0.1 s, which means that to hear a clear echo, the reflected sound must be at least 0.1 seconds after the original sound.

Hence, option (a) is correct.