1572. In thermal radiation for a black body (where, ε is emissivity and α is absorptivity) September 7, 2025 by Admin α = 1; ε ≠ 1 α ≠ 1, ε = 1 α ≠ 1, ε ≠ 1 α = 1; ε = 1 ✅ The correct answer is option D.
