Here Important Physics MCQ questions are added which are frequently asked in almost all the examinations. You can check the correct answer of any question on clicking the show answer button or on option itself. The Correct answer will be displayed below. You can share any question with your friends on whatsapp by tapping whatsapp button.
Q) Which of the following phenomenon is responsible for the echo of sound wave
(A) Refraction
(B) Interference
(C) Polarisation
(D) Reflection
Correct Answer - Option
(D)
Explanation:
Echo occurs when a sound wave hits a solid surface and bounces back to the listener. This bouncing back of sound is due to the reflection of sound waves. For an echo to be heard, the reflecting surface must be at least 17 meters away from the sound source to allow the human ear to distinguish it as a separate sound.
Refraction (A): Bending of sound waves when they pass through different mediums.
Interference (B): Overlapping of sound waves, leading to constructive or destructive interference.
Polarisation (C): Happens only in transverse waves (like light), not in sound waves, which are longitudinal.