定义

描述物质（内部）吸光率的一个指标。如果该物质的单位透射量是 t，吸收系数（a）就是：

a = 1 – t

English Expresstion

absorption coefficient

Definition

An indicator of a material’s internal absorptance. If the unit transmission of the material is t, the absorption coefficient (a) is:

a = 1 – t

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