What does the emissivity of a material refer to?

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试卷: LEED GA模拟题A[查看]
What does the emissivity of a material refer to?
A: The environmental benefits of the material over time
B: Measure of a materia’s ability to reflect sunlight (including visible, infrared, ultraviolet wavelengths) on a scale
C: How hot a surface would get relative to standard black and standard white surface
D: The ratio of energy radiated by a particular material to energy radiated by a black body at the same temperature

参考答案: D

本题解释:
The emissivity of a material is the ratio of energy radiated by a particular material to energy radiated by a black body at the same temperature. It is a measure of a material’s ability to radiate absorbed energy.