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| Q. |
What relation between emissivity, e, and Absorptive Power, a, is given by Kirchhoff’s law? |
| A. | e < a |
| B. | e > a |
| C. | e = a |
| D. | no specific relation |
| Answer» C. e = a | |
| Explanation: kirchhoff’s law states that for any object the emissivity is always equal to absorptive power. for a black body, both of them are equal to one. | |
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