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1. |
If a black body at 1000 K and a gray body at 1250 K emit the same amount of radiation, what should be the emissivity of the gray body? |
A. | 0.3096 |
B. | 0.4096 |
C. | 0.5096 |
D. | 0.6096 |
Answer» C. 0.5096 | |