What is the coefficient of transmission for athermanous materials?
Q.2 (iii) What is the coefficient of transmission for athermanous materials?
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Answer: Zero (\(t = 0\)).
Athermanous materials do not transmit any heat radiation incident on them, so \(a + r = 1\) and the coefficient of transmission \(t = 0\).
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· 28 Oct 2026
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