MCQOPTIONS
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MCQOPTIONS
| 1. |
When a sound beam is reflected: |
| A. | The angle of reflection is found using Snell's law |
| B. | The angle of reflection equals the angle of incidence |
| C. | All the sound energy is reflected unless the acoustic impedanmce is zero |
| D. | Beam spread is decreased |
| Answer» C. All the sound energy is reflected unless the acoustic impedanmce is zero | |