MCQOPTIONS
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| 1. |
The second critical angle is defined as the longitudinal wave incident angle which results in: |
| A. | A refracted longitudinal wave of ninety degrees |
| B. | A refracted shear wave of ninety degrees |
| C. | Complete reflection of the sound beam |
| D. | None of the above |
| Answer» C. Complete reflection of the sound beam | |