单词	reflectivity
释义	reflectivity /riːflɛkˈtɪvɪti / noun Physics The property of reflecting light or radiation, especially reflectance as measured independently of the thickness of a material.Light reflectivity is another key performance area.... When polished, silver has the highest-known reflectivity of visible light. Aluminum has a light reflectivity of over 80 percent, which has led to its wide use in lighting fixtures.
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