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In thermal radiation for a black body (where, ε is emissivity and α is absorptivity) | |
A. | α = 1; ε ≠ 1 [Wrong Answer] |
B. | α ≠ 1, ε = 1 [Wrong Answer] |
C. | α ≠ 1, ε ≠ 1 [Wrong Answer] |
D. | α = 1; ε = 1 [Correct Answer] |