wenshouyang 发表:AU就是吸收度单位(absorbance unit),通过公式换算
Absorbance is a logarithmic scale, so that an absorbance unit (AU) of 1.0 is equal to 90% absorbance (that is, 10% transmission), an AU of 2.0 is equal to 99%, an AU of 3.0 is equal to 99.9%, and so on.
你物理上测得物质的透光率,然后取负对数得到吸收度。1.0对应90%的吸收,即透过了0.1,取10为底数的负对数值得到1.0,2.0对应99%的吸收,即透过了0.01,取10为底数的负对数值得到2.0.
那么请问这个数值有最大值吗?