摘要
目前通行的光学教材中关于光亮度定义的文字叙述和数学表达式基本相同，但是却有两种不同的几何图示．本文对光亮度定义的两种几何图示作了比较分析，指出其中一种几何图示不能既准确又形象地描述光亮度的定义．
The definition and expression of brightness in current textbooks are nearly the same, but there are two different kinds of geometrical schemes used. Through the comparative analysis between the two kinds of schemes, it is pointed out that one of them cannot express the brightness definition accurately and figuratively.
出处
《大学物理》
1998年第2期2-6,共5页
College Physics
