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| Q. |
Which phenomenon is responsible for the echo of sound wave? |
| A. | Reflection |
| B. | Refraction |
| C. | Interference |
| D. | Polarization |
| Answer» A. Reflection | |
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Explanation: Reflection of sound waves off of surfaces lead to one of two phenomena - an echo or a reverberation. The echo is produced due to hitting of the sound waves with the obstacles which makes the Sound to reflect back. Echoes occur when a reflected sound wave reaches the ear more than 0.1 seconds after the original sound wave was heard. |
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