| 单词 | absorptance |
| 释义 | Word Frequency absorptance(əbˈsɔːptəns, -ˈzɔːp-) or absorption factor noun physics a measure of the ability of an object to absorb radiation, equal to the ratio of the absorbed radiant flux to the incident flux. For a layer of material the ratio of the flux absorbed between the entry and exit surfaces of the layer to the flux leaving the entry surface is the internal absorptance Symbol: α. Compare reflectance, transmittance Word origin C20: absorption + -ance |
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