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| Q. |
How much amount of incident radiation is reflected at lower power densities? |
| A. | 10 percent |
| B. | 20 percent |
| C. | 50 percent |
| D. | 90 percent |
| Answer» D. 90 percent | |
| Explanation: most of the metals reflect nearly 90 percent of incident radiation if the power densities are low. | |
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