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1. |
A spherical body of area A and emissivity e = 0.6 is kept inside a perfectly black body. Energy radiated per second by the body at temperature T is |
A. | 0.4σAT<sup>4</sup> |
B. | 0.8 σAT<sup>4</sup> |
C. | 0.6 σAT<sup>4</sup> |
D. | 1.0 σAT<sup>4</sup> |
Answer» D. 1.0 ‚âà√¨‚àö√¢AT<sup>4</sup> | |