†(a) the degree to which a refractive medium slows down light passing through it (obsolete); (b) Physics the logarithm to the base 10 of opacity.
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| 单词 | θ76347 |
| 释义 | the world > matter > physics > electromagnetic radiation > light > refraction > [noun] > refractive power > optical density (3) optical density1864 †(a) the degree to which a refractive medium slows down light passing through it (obsolete); (b) Physics the logarithm to the base 10 of opacity. absorbance1900 Physics. A measure of the capacity of a substance to absorb light of a specified wavelength; spec. the logarithm of the ratio of the incident… absorbancy1927 Physics. The ratio of the absorbance of a solution to that of a similar body of pure solvent, giving a measure of the concentration of the solute. |
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