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The coefficient of reflection of a perfectly opaque body is 0.16. Its coefficient of emission is (A) 0.94 (B) 0.84 (C) 0.74 (D) 0.64. |
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Answer» Correct Option is (B) 0.84 In case of opaque body transmitivity \(\gamma = 0\) For any body relation \(\alpha + \beta + \gamma = 1\) where, \(\alpha =\) absorbtivity \(\beta =\) Reflectivity \(\gamma =\) transmitivity \(\alpha + \beta +0 = 1\) \(\alpha = 1 - \beta\) \(\alpha = 1 - 0.16\) \(\alpha = 0.84\) Correct option is (B) 0.84 |
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