辐射系数或辐射率（emissivity）指的是材料的什么特性？

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试卷: LEED v4 GA模拟题A卷中文[查看]
辐射系数或辐射率（emissivity）指的是材料的什么特性？What does the emissivity of a material refer to?
A: 测量材料反射太阳光的能力（包括可见光、红外线及紫外线波长），范围是从0-1 The measure of a material’s ability to reflect sunlight (including the visible, infr
B: 相对于标准黑色和标准白色表面，某个材料表面如何得热 How hot a surface gets relative to standard black and standard white surfaces
C: 材料持续的环境好处 The environmental benefits of the material over time
D: 同样温度下，某特定材料辐射能与黑体辐射能的比率 The ratio of energy radiated by a particular material to energy radiated by a black body at the sa

参考答案: D

本题解释:
正确答案：D
系统解析: D：辐射率（emissivity）是材料把已经吸进的能量再辐射出去的能力。

D: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.