A particular gray body surface has absorptivity of 0.35 and reflectivity of 0.45. What is its emissivity and transmissivity?
What will be an ideal response?
From Kirchof’s law, the emissivity is the same as the absorptivity, or 0.35. The sum of the absorptivity, reflectivity, and transmissivity is identically one (1), so that the transmissivity is 0.2.
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